Cambridge Civic Journal Forum

September 15, 2011

Concord Avenue, Under Construction

Filed under: Cambridge government,cycling,Fresh Pond,planning,transportation — Tags: , , , , , , , , , , — jsallen @ 1:33 pm

I just rode Concord Avenue last Sunday to see what was happening there.

I had thought that the construction project would have been completed by now, but it isn’t.

The image below is of the east end of the section under construction. I find a bit of irony here in that the “Bikes May Use Full Lane” sign is placed at the start of a project which intends to get bicycles off the road, and also it is nonstandard — diamond-shaped like a warning sign which is supposed to be yellow, but white like a regulatory sign, which is supposed to be rectangular (as with speed-limit and no parking signs). The message is a regulatory message: it is law.

Looking west at the east end of the Concord Avenue section under construction

Looking west at the east end of the Concord Avenue section under construction

Construction barrels divide the narrowed roadway into two lanes, rather than the three planned for when construction is complete. As the westbound bikeway is incomplete, I rode west on the roadway. Motorists still were able to overtake me without leaving their lane, as they were when the roadway was wider, with three travel lanes and a bike lane on either side. I was passed by a number of cars, no problem. I had one conflict with a driver who moved out of a side street into my path. Such conflicts will be much more common when bicyclists are riding in sidewalk space.

The road surface was very bumpy because the street has not yet been repaved. The effort is going into construction of the bicycle sidepaths at this time.

I shot video of my rides. It’s HD video and you will want to view it full screen to get all the details. This is the link to the video of my westbound ride. And here is my eastbound ride.

One other thing I hadn’t expected is that the south-side (eastbound) path was almost completely empty, except for me, though it was nearly finished, and unobstructed — on a warm, sunny Sunday afternoon when there was heavy bicycle and pedestrian traffic in Fresh Pond Park and on the Minuteman path.

I can say that if much traffic does appear on the south-side path, the situation will be very confused. There is no buffer between the 5′ wide bikeway (closer to the curb) and the wider walkway away from the curb. There was supposed to be a 2-foot-wide buffer, as I recall. Also, the concrete pavement of the pedestrian section, farther from the curb, is smoother. The bumpier asphalt pavement adjacent to the curb is supposed to be for eastbound bicyclists, in defiance of AASHTO guidelines, which require a 5′ spacing or a barrier, and also in defiance of normal path and road rules, which require riding on the right side. The City’s scheme would have eastbound bicyclists riding on the left side of the combined bikeway and walkway. Meanwhile, there also will be westbound bicyclists using this path to avoid the much worse path on the other side of the street, and probably keeping to the right as is usual.

As the path is behind a high curb, bicyclists who want to cross Concord Avenue will have to wait at the crosswalks rather than to merge into the roadway. At the few crosswalks, there is no waiting area (for example, at 1:24 in the eastbound video). Because the bikeway is between the walkway and the street, bicyclists and pedestrians who are waiting to cross the street will block the bikeway, and other bicyclists will have to divert onto the walkway.

As the concrete pavers of the pedestrian section and the asphalt of the bicycle section age and settle, a step could develop between them, just as on the parts of the Charles River paths, widened with asphalt next to the old stone retaining wall along the riverfront. Many bicyclists have gone down as a result.

Many aspects of the Cambridge bicycle program can be described as ideologically driven, and defying national and state design standards. Placing a longitudinal seam along a bikeway, and directing traffic to keep left, are merely incompetent.

Other than what I have described in this post, the project looks as though it will turn out as I expected, with the foreseeable problems I’ve already described in my earlier post; the right hook and left cross conflicts, inability to cross to the south side at most locations without dismounting in the street to lift the bicycle over a curb; resulting wrong-way riding on the north side, etc.

The party line about the Concord Avenue project, which I have in writing from two City employees (here and here) and verbally from a member of the Cambridge Bicycle Committee, is that “bicyclists will be riding in exactly the same place as they are now.” This statement turns a blind eye to the encouragement of wrong-way riding, and the keep right/keep left confusion. It ignores bicyclists’ crossing and turning maneuvers, and motorists’ being trapped by the curbs and forced to turn across the path of bicyclists; it denies that motorists block sidepaths so they can see approaching traffic in the street. Saying that “bicyclists will be riding in exactly the same place as they are now” is like saying that a bird in a cage, hanging in a tree, is in exactly in the same place as a bird sitting in that tree and free to fly off.

What really burns me up is that the City employees designing bicycle facilities appear to have no concept of how bicyclists actually are going to use them, or of the potential hazards. It’s all about “build it and they will come” and that means, build just anything they think will attract novice cyclists and children, and to hell with design standards and safety research. I see shoddy and incompetent mimicry of European designs, and astonishing hubris. So far, the Concord Avenue bikeway is half built with one side completely open, and very few bicyclists have come, except for me, and I was there on a discovery tour.

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June 20, 2011

June 20, 2011 City Council Agenda Highlights – The Joy of Opportunism

Filed under: City Council,cycling — Tags: , , — Robert Winters @ 11:36 am

June 20, 2011 City Council Agenda Highlights

This Monday’s meeting could prove interesting. There are a number of significant zoning-related matters, but the items that jump right out are Committee Report #4 and Councillor Clarey Kelley’s Order #4. Opportunism apparently knows no bounds. Some may recall Councillor Kelley’s earlier Order in which he (or his ghost writer) prematurely speculated on the retirements of the City Clerk, the City Manager, and various department heads and how best to seize the moment. His colleagues handed him his head for that piece of spectacular rudeness. His latest Order is an attempt to renegotiate the City Manager’s contract based on an inadvertent omission in the 2006 and 2009 contracts that must now be corrected. Could someone loan Councillor Kelley a moral compass? He’s apparently quite lost.

Here are a few items of interest on the Agenda.

Manager’s Agenda #10. Transmitting communication from Robert W. Healy, City Manager, relative to Awaiting Report Item Number 10-57, regarding a report on Harvard University’s acquisition of three properties formerly owned by the Society of Jesus of New England/Weston School of Theology and affordable housing in Cambridge.

Committee Report #2. A communication was received from D. Margaret Drury, City Clerk, transmitting a report from Councillor Marjorie C. Decker, Chair of the Housing Committee, for a public meeting held on May 9, 2011 for the purpose of receiving information regarding plans to sell Craigie Arms (also known as Chapman Arms) and the City’s options to preserve affordability.

Order #7. That the City Council go on record asking Harvard University to work closely and cooperatively with the City Manager, the Affordable Housing Trust, Homeowner’s Rehab, Inc., tenants and others to facilitate the sale of the property to Homeowner’s Rehab, Inc to ensure the continued affordability at Craigie Arms for current and future tenants.   Councillor Decker

I might also add to this the upcoming meeting of the Community Preservation Act Committee scheduled for Tuesday, June 21 at 6:00pm at the Cambridge Senior Center. It is again expected that they will dedicate the maximum 80% for "affordable housing" and the minimum 10% to both open space and historic preservation. Perhaps dedicating so much money and other resources toward "affordable housing" still makes sense, but there never seems to be any effort made to measure the need or the effectiveness of these expenditures. There is a "Freakonomics" concept that if one community (like Cambridge) dedicates a disproportionate amount of resources to this, the effect may be to actually increase the local demand for this housing. Expenditures seem to be driven more by beliefs than by any hard analysis and rarely, if ever, do we see a regional analysis of housing needs and provision. How many people believe that housing agencies ensure that only those with legitimate needs are receiving the benefits of government-subsidized housing? In many respects, it has become just another system to be "gamed".

Manager’s Agenda #12. Transmitting communication from Robert W. Healy, City Manager, relative to the appointment of Richard Johnson as a member of the Cambridge Water Board for a five year term, effective June 30, 2016.

Here’s to the many men and women who serve without compensation on the many City boards and commissions. Voter turnout and civic responsibility may be in decline, but the tradition is carried on by all those who volunteer for these boards and commissions.

Manager’s Agenda #25. Transmitting communication from Robert W. Healy, City Manager, relative to proposed zoning language to enable a regional bike share program.

It may seem strange that the zoning code has to be amended to allow this use, but it is a service for a fee just like any other commercial use and the zoning code does spell out what uses are permitted in which zones. One curiosity in the proposed amendment is that all signage and illumination for a Public Bicycle-Sharing Station is exempt from regulation. Does this permit advertisements by companies that might subsidize the bike-sharing program?

Manager’s Agenda #29. Transmitting communication from Robert W. Healy, City Manager, relative to a Planning Board recommendation of the Section 5.28.2 Rezoning Petition.

Unfinished Business #9. A communication was received from D. Margaret Drury, City Clerk, transmitting a report from Councillor Sam Seidel, Chair of the Ordinance Committee for a public hearing on May 5, 2011 for the purpose of considering proposed amendments submitted in response to City Council Order No.11 of Jan 24, 2011, in which the Council requested that Community Development Department (CDD) staff engage in a comprehensive review of Section 5.28.2, including the history of the use of the section for special permit applications for conversion of commercial and institutional uses to residential building, and the recent public conversations on this section of the Zoning Ordinance. The question comes on passing to be ordained on or after June 20, 2011. Planning Board hearing held May 10, 2011. Petition expires Aug 3, 2011.

This proposed zoning amendment (spurred primarily by a development on Norris Street) will come to a vote either at this meeting or very soon. At issue is the appropriateness of language introduced in the years following the demise of rent control when new housing was being encouraged and when there may have been insufficient attention paid to the unintended consequences of those policies. One interesting idea expressed in this discussion and at the recent Roundtable meeting with the City Council and the Planning Board is to detail what could actually be built in various parts of the city under the current zoning ordinance. At a recent neighborhood study meeting (for Mid-Cambridge), CDD staff showed maps detailing where and how many new housing units could be built as of right without the need to seek a variance. Most proposed zoning changes are done either by developers who want increased densities for their projects (for which they often offer "community benefits" for the privilege) or by neighbors threatened by a specific development proposal. Ideally, the Planning Board and the Community Development Department should conduct "what if" studies throughout the city to identify potential problems before they arise.

Manager’s Agenda #32. Transmitting communication from Robert W. Healy, City Manager, relative to a request for approve of the alteration, layout and acceptance of the portion of Vassar Street that is between Massachusetts Avenue and Audrey Street in the City of Cambridge.

This is about the sidewalk bicycle paths that were underwritten by MIT along Vassar Street. Sadly, there are City staff who believe that the only safe place for cyclists is on the sidewalk, and they choose to ignore any testimony to the contrary. Few people will disagree with the value of such facilities along high-speed arterial roads such as Memorial Drive, but there are strong arguments to be made against such facilities along ordinary roads, especially when the creation of such sidepaths causes on-street lanes to be narrowed to the point that they become less safe for cyclists who choose to travel on the road rather than on the sidewalk (such as the current proposal for Western Avenue). The Vassar Street facilities are, at best, unnecessary.

Unfinished Business #7. A communication was received from D. Margaret Drury, City Clerk, transmitting a report from Councillor Sam Seidel, Chair of the Ordinance Committee for a public hearing on Apr 6, 2011 and a follow-up public meeting on May 17, 2011 to consider a petition to amend the Cambridge Zoning Ordinance filed by Novartis Institute for BioMedical Research, joined by M.I.T. as land owner, to allow for the creation of a new Special District 15 along a portion of Massachusetts Avenue between Albany Street and Windsor Street opposite the location of the Novartis main campus at the former Necco Building. The question comes on passing to be ordained on or after June 6, 2011. Planning Board hearing held Mar 29, 2011. Petition expires July 5, 2011.

Committee Report #5. A communication was received from D. Margaret Drury, City Clerk, transmitting a report from Councillor Sam Seidel, Chair of the Ordinance Committee for a public meeting held on June 15, 2011 to continue to consider a petition to amend the Cambridge Zoning Ordinance filed by Novartis Institute for BioMedical Research, joined by M.I.T. as land owner, to allow for the creation of a new Special District 15 along a portion of Massachusetts Avenue between Albany Street and Windsor Street opposite the location of the Novartis main campus at the former Necco Building.

There is little doubt that the Novartis Petition, possibly with some amendments and certainly with some "community benefits" forked over, will pass either this week or next. Everybody loves Novartis. In the report, Councillor Reeves notes that the matter of community benefits has been referred to the Government Operations and Rules Committee to explore the issues of what principles should govern the negotiations for community benefits and to develop a formula based on these issues, but nothing has yet come of this. Reeves states that "there should be a community benefit fund and the City Councillors should decide what community agencies should benefit. He himself would tend to favor the settlement houses because they benefit some of the most disadvantaged residents."

It is indeed unfortunate that the Government Operations Committee has chosen not to address this issue. The inherent danger in the increased use of these "community benefits" deals is that the City Council might never reject a zoning petition as long as it has sufficient money promised that can be allocated at the discretion of the City Council. The committee report states that "Novartis is prepared to offer $1 million to go to the City of Cambridge for allocation of such benefits to the community as the City Council determines."

Unfinished Business #8. A communication was received from D. Margaret Drury, City Clerk, transmitting a report from Councillor Sam Seidel, Chair of the Ordinance Committee for a public hearing on Apr 6, 2011 for the purpose of considering the re-filed Fox petition to rezone an area primarily along Cottage Park Avenue from Business A-2 to Residence B. The question comes on passing to be ordained on or after June 20, 2011. Planning Board hearing held Mar 29, 2011. Petition expires July 5, 2011.

As with the Novartis Petition, this must come to a vote either this week or next, or it will expire. The Planning Board has not yet reported on the re-filed Fox petition, but it gave a negative recommendation in January on the original petition.

Committee Report #4. A communication was received from Donna P. Lopez, Deputy City Clerk, transmitting a report from Councillor Timothy J. Toomey, Co-Chair of the Government Operations and Rules Committee for a public meeting held on June 8, 2011 to discuss clarification/correction to the City Manager’s contract.

Order #4. That the City Manager is requested to submit an order allocating funds from the current budget so that the City Council can hire outside counsel to provide independent advice about the manager’s employment contract and his request to amend it.   Councillor Kelley

These two items will likely guarantee the attendance of the perennial Healy-haters – led by Councillor Kelley’s mentor/ghost writer Richard Clarey who has carried on his vengeful campaign for decades through a variety of venues. It’s one thing to harbor ill feelings about Robert Healy or even to take the position that the City should cave in to every lawsuit filed by those seeking "to milk Mother Cambridge" (as Councillor Reeves once characterized it). It’s an entirely different matter to opportunistically try to use an unintentional error in the wording of the Manager’s contract to renegotiate that contract after the fact. – Robert Winters

May 20, 2011

Response to City officials’ comments about Concord/Follen

Filed under: Cambridge government,City Council,cycling,Uncategorized — Tags: , , , , , , , , , — jsallen @ 8:49 pm

Robert Winters has posted a comment (#3 here) to my post about bicycling issues on the May 16 City Council agenda. Robert quotes Assistant City Manager for Community Development Brian Murphy and Traffic, Parking & Transportation Director Susan Clippinger about Follen Street and Little Concord Avenue. Their response, by way of the City Manager, is addressed to the City Council at next week’s meeting.

Their response (again, in comment #3 here) addresses some of the issues with the Follen Street/Concord Avenue installation, and reflects some progress.

Serious design issues, however, will still remain:

  • The configuration still has the same blind corners.
  • Because of the location of the curb cut into the brick plaza, bicyclists traveling away from the Common must still swerve to the right, toward approaching motor traffic, to reach the curb cut at the crosswalk on the far side of Follen Street. Bicyclists entering from the brick plaza are still close to a wall which also obscures motorists’ view of them.
  • Motorists approaching on Follen Street still won’t have a stop sign — see this Google Street View — despite the blind corners.
  • The contraflow bike lane adjacent to wrong-way parking remains.
  • There is another blind corner at the Garden Street end of the pedestrian plaza, particularly for cyclists who continue toward the Radcliffe Quadrangle on the sidewalk (and many do, though that is inadvisable).
  • The “bike box” on Concord Avenue leads to more confusion than anything else, as described here. Also, many cyclists ride east on the north sidewalk, so they can access the plaza directly, posing a risk of head-on collisions with westbound cyclists and pedestrians at the blind corner between the sidewalk and the plaza.

Contraflow bicycle travel would be safer if parking were removed from one side of Follen Street — however, the public insists on using public street space for private car storage. As a bicycling advocate and former Cambridge resident who owned a (rarely used) car and had no other place to park it than the street, I can see both sides of this issue. It is not going to go away. The people who laid out Cambridge’s streets could not foresee the deluge of private motor vehicles that would descend on the city, and had no plan either to accommodate it or to forestall it.

I do think that a very significant safety improvement could be made without removing parking, by reversing the direction of one-way motor traffic on Follen Street and Little Concord Avenue. Then cyclists headed toward the blind corner would be going in the same direction as motorists. The motorists would be going very slowly here, and cyclists could easily merge toward the center of the roadway. A curb cut into the plaza in line with the center of the roadway would avoid cyclists’ having to swerve right. This curb cut would lead cyclists traveling toward the Common to the right side of the street.

A contraflow bike lane could then be installed on the south side of Little Concord Avenue, but it would still be adjacent to wrong-way parking. I’d rather see shared-lane markings far enough from parked cars to allow a motorist to start to exit a parking space without running head-on into a cyclist or forcing that cyclist into oncoming traffic. One-way, slow streets where bicyclists are allowed to travel contraflow are common in Germany, without bike lanes, and research has demonstrated their safety.

As to Murphy’s and Clippinger’s comments:

Motor vehicle volumes on the street are very low and most drivers are ones who live there and use the street regularly. The contraflow lane was installed to improve safety for cyclists by creating a dedicated facility for them to ride in and through the presence of pavement markings to remind motorists that bicyclists are traveling there.

The low motor-vehicle volume argument is an example of what I call “bean counter” safety analysis. I have heard the same argument before from Cara Seiderman, in connection with the wrong-way contraflow lane on Scott Street. This approach offers cyclists and motorists only statistical comfort, leaving them defenseless against actually preventing a crash through their own actions — as in “well, I can’t see over the SUV parked in front of my car, but probably no cyclist is coming so I’ll pull out.”

The bike lane does serve as a buffer to help prevent collisions between cars and other cars, but it doesn’t pass the test of preventing collisions between cars and cyclists. The comforting words “dedicated facility” don’t actually describe how it works in practice. Reminding motorists that bicyclists are traveling in the bike lane doesn’t count for much if the motorists can’t see the bicyclists.

Clippinger describes a safety analysis which looked at generalities about traffic volume. The claim that the dedicated facility was installed to improve safety may describe intention, but it does not describe either the design, or the outcome. This is a crash hotspot, remember. I have described design issues, and some solutions that look rather obvious to me. The city, as usual, installed a boilerplate bike lane design without much insight into whether it actually would be functional and safe.

May 16, 2011

About bicycling issues on City Council agenda tonight, May 16, 2011

Filed under: City Council,cycling,planning — Tags: , , , , , , , , , , — jsallen @ 11:03 am
A cyclist and a motorist approach the blind corner at Concord Avenue and Follen Street

A motorist cuts off a cyclist at the blind corner of Concord Avenue and Follen Street

The city's own picture of this scene shows a cyclist happily steering straight toward a curb.

A picture of the same scene from the City's Web site shows a cyclist happily steering straight toward a curb, which is cropped out of the picture.

Looking from the opposite direction, this is the path a bicyclist must take, swerving toward traffic to reach the curb cut.

Looking from the opposite direction, this multiple-exposure photo shows the path a bicyclist must take, swerving toward Follen Street traffic to reach the curb cut at the crosswalk.

This post attempts to shed some light on agenda items on tonight’s City Council agenda.

The quoted sections are from another commenter. I’m not sure I know how to reach him, and time is pressing. I don’t know whether I have permission to use his name, so I won’t. The unindented paragraphs  are my own. We’ll start with the other person who commented.

Two of the three items on the city council agenda are interesting examples of problems related to bicycle infrastructure that has been implemented over the past several years.  The third is simply a request to fill potholes, but includes an ignorant comment about bicycles needing to ride near the curb (not true according to Massachusetts law or Cambridge ordinance).

That is agenda item O-7 on the page linked here

The first bicycle facility problem is a contra-flow lane through a blind corner where motorists have no expectation that there will be contra-flow traffic of any sort as they round the corner on a one-way street.

http://bit.ly/iAHCfU

That is agenda item O-3 on the page linked here.

The street view is looking south on Follen Street as it intersects (Little) Concord Avenue.  The bike lane crosses in a contraflow manner from left to right, and then continues across the small brick plaza to the right to join with Garden Street and the continuation of Concord Avenue.  The intersection just beyond the plaza is the same one where Cambridge has installed a bike box critiqued by John Allen

(http://bit.ly/jQN595).

The contraflow bike lane is adjacent to wrong-way parking, another odd feature of this installation — see this for a description and explanation of wrong-way parking:

http://bikexprt.com/bikepol/facil/lanes/contraflow.htm#scottst

Upon reaching the corner, bicyclists have to ride out past a stop bar and stop sign before they can see around the corner. A stop sign requires two actions, a stop and a yield. The yield is what actually prevents a collision — but it is only possible where you can see conflicting traffic.

Many if not most of the bicyclists approaching this intersection are Harvard students headed up to the Radcliffe quadrangle. Are we to assume that they aren’t bright enough to figure out that they must yield? The problem is that nobody ever instructed them, and many have little bicycling experience as they suddenly find themselves dependent on a bicycle for transportation. Also, the stop bar isn’t where there’s anything to yield to unless a pedestrian happens to be crossing — it encourages running the stop sign, sort of like traffic ju-jitsu: aha– fooled ya!.

See Google Street View looking toward the stop sign:

http://tinyurl.com/4yfz9bc

I have a discussion of this contraflow bike lane in the page linked below this paragraph. The third photo down the page shows the stop sign. I prepared the page linked below years ago, shortly after the installation. This was clearly going to be a problem location.

http://bikexprt.com/massfacil/cambridge/harvardsq/litlconc.htm

The curb ramp on the far side of the intersection is located at the end of the crosswalk rather than in line with the bike lane. Bicyclists must ride toward approaching traffic to reach the ramp.

Bicyclists coming in the opposite direction off the little pedestrian plaza are hidden by a wall and subject to similar risks. This entire treatment is a prime example of Cambridge’s principle of Design by Wishful Thinking.

The second problem is at a rather unremarkable intersection, so it is not clear to me why there would be issues.

See Council Order O-19 on the page linked here.

http://bit.ly/kQWgBQ

The street view is looking south on Ellery Street as it approaches Broadway.  Ellery is a narrow one-way street with a bike lane.  Traffic is typically slow, but can be heavy at rush hour.  Broadway is a two-way narrow connecting through street with parking and no bicycle infrastructure in this area.  Traffic typically runs about 25-30mph, slower and heavier at rush hour.  The intersection is also at the corner of a local public high school campus.  Neither street is difficult to cycle on if you have at least modest traffic experience.

There is a flashing yellow and red overhead signal indicating a stop sign for Ellery Street entering from the north.  I tried to find data related to the several accidents cited, but did not see anything apparent on the Cambridge city web site.  I can speculate that most of the car/bike accidents are probably due to scofflaw behavior — either bicyclists in the Ellery bike lane not heeding the stop sign as they continue across Broadway, or wrong-way riders in the Ellery Street bike lane illegally approaching Broadway from the south.  Also likely would be standard right hook, left cross, and failure to yield collisions caused by motorists, but I don’t see why those would be any worse at this intersection.

I see a double-whammy right-hook provocation for bicyclists headed south on Ellery Street, in that the bike lane on the far side of the intersection is to the left of parking (and in the door zone, as is usual in Cambridge), while the bike lane on the near side is at the curb and carried all the way up to the intersection. So, bicyclists are encouraged to overtake motorists on the right, then merge left inside the intersection where motorists turn right.  I think that the high traffic volume and prevalence of high-school students probably also account for the number of crashes. There probably are scofflaw crashes too. Yes, it would be very interesting to see details so as to get a handle on what is actually happening here.

I’m not looking for any answers, but I thought people on this list might be interested in what Cambridge lawmakers are thinking.

November 3, 2010

Specific issues with Western Avenue project

Filed under: Cambridge government,cycling,planning,water — Tags: , , , , , , , , , , , , — jsallen @ 2:24 pm

In this post, I’m going to examine some of the drawings of its Western Avenue project which the City of Cambridge has provided.

All of the illustrations below are from the City’s conceptual design booklet.

Western Avenue concept drawing

Western Avenue concept drawing

The cars shown parked at the left are real cars, in the original photograph that was modified to show the conceptual design. Typical sedans are about 5 1/2 feet wide, not counting the side-view mirrors, but common light trucks are as much as 6 1/2 feet wide. Big trucks and buses can be 8 1/2 feet wide.

The cars shown parked at the right are drawings added when the photo was modified. All of them are micro-cars, very much smaller than the cars on the left — only about 4 1/2 feet wide.

Bicyclists complain about “door zone” bike lanes — where opening car doors pose a threat. On the other hand, the door zone serves an important function. A motorist can open the car door without its protruding directly into the path of motor traffic, and can walk around the car.

In the drawing below, I have copied the nearest car in the original drawing into each travel lane. This drawing shows too little clearance between parked vehicles and moving ones to allow motorists safely to walk around to the street side of their vehicles or open the doors. The right lane as shown is especially tight, even with micro-cars parked on the right and ordinary sedans in the travel lanes — though Western Avenue is a designated bus and truck route.

Western Avenue concept drawing, modified

Western Avenue concept drawing, modified

To show how wide the left lane is at present, the white line in the foreground replaces the gray patch that is dimly visible in the original drawing, covering up the location of the present lane line.

The parts of the illustration that are from the original photo are to scale — including the cars I have copied into the travel lanes. The drawn-in elements are conceptual, and some are not to scale.

The drawing below, also from the City, is dimensioned, showing a 36-foot wide roadway. The elements are to scale: 10.5 foot travel lanes, 7-foot parking lanes and mid-sized cars 6 feet wide, not counting the mirrors — like a a Ford Taurus. This drawing shows more room between vehicles than the right lane in the photo, but on the other hand, the parked cars are tight against the curbs, and no trucks or buses are shown.

Cross-section of street with cycle track

Cross-section of street with cycle track

Now let’s look at an overhead drawing, which shows a typical treatment at an intersection.

Western Avenue at Jay Street

Western Avenue at Jay Street

Let’s put more cars and some bicyclists and pedestrians into the picture. I’ve put three bicyclists on the blue strip which represents the cycle track. Two are headed with traffic and one is headed opposite traffic. (Off-street facilities encourage two-direction traffic, and this is particularly so on a one-way street where there is no opposite-direction paired street conveniently nearby.) There also is a group of pedestrians standing on the bulbout before the intersection. Excuse me if the bicyclists and pedestrians look like ants, I’m no Picasso.

Pedestrians and parked cars conceal  right-way bicyclists from drivers of cars A and B, increasing the risk of a “right hook” collision. Also, Car B  is blocking the right-hand travel lane. Such blockages will increase congestion. The more bicyclists, the more often turning motorists will have to wait in the position shown. At present, motorists can keep moving as they prepare to turn right, because they can merge behind a bicyclist before reaching the intersection.

Car C in the drawing must wait far back from the intersection, what with the separate sidewalk and cycle track. Then, on reaching the intersection, as shown in the illustration below, the car must block the cycle track as the driver scans for traffic. If more than one car is in line, both the sidewalk and the cycle track will be blocked at the same time.

Western Avenue at Jay Street, cycle track blocked

Western Avenue at Jay Street, cycle track blocked

Presently, without the cycle track, this kind of blockage happens only for the sidewalk. It is more troublesome and hazardous for bicyclists than pedestrians, because bicyclists are faster, and farther away when the driver must first see them, and can be hidden by buildings or by pedestrians on the sidewalk. The crash rate for wrong-way cyclists on cycle tracks like this one is very high — research in Finland, Sweden and Germany has shown it to be about 10 times as high as for right-way travel on the street. Right-way travel on a cycle track located, like this one, behind parked cars, and with unsignalized intersections and driveways, has been shown only two or three times as hazardous.

There is also a much greater risk of collisons with pedestrians, and with other bicyclists, than when riding in the street. This cycle track has about 6 feet of width where bicyclists are clear of car-door hazards or plantings — very substandard for a two-way facility.

There is a question what the wrong-way bicyclists will do when they reach Franklin Street and the cycle track ends. Most likely, they will go up onto the sidewalk or ride opposite traffic in the bike lane.

Finally, let’s look at the intersection of Western Avenue and Memorial Drive. At present, Western Avenue has four travel lanes approaching the intersection.  The rightmost lane is a right-turn-only lane which the City describes as underutilized. I agree with that description — even in the evening rush hour, I have been able to filter forward to the intersection on my bicycle in that lane.

The City proposes to change that lane into a cycle track, so right turns are made from the next lane to the left. In this connection, I question the City’s conclusion that its plan will not increase congestion. In the evening rush hour, traffic already queues on Putnam Avenue and Memorial Drive, all the way back to River Street. Even one vehicle waiting to turn right, while bicyclists overtake on the right, will block all other vehicles in the lane behind it. This is aside from the issue of institutionalizing the “right hook” — placing all responsibility for bicyclists’ safety on the motorists, and stripping away bicyclists’ defense of merging into the line of right-turning traffic.

Western Avenue at Memorial Drive, conceptual drawing

Western Avenue at Memorial Drive, conceptual drawing

I suggest instead that bicyclists be encouraged to travel along the left side of the right-turn lane, by means of shared-lane markings and signage, or better, if there is room, a through bike lane.

The question remains of how to handle opposite-direction bicycle traffic. It does not admit of an easy answer.  At this point, I’m most inclined to try to address it on River Street.

And, I’ll add: the sacredness of on-street parking is the issue that makes the problem insoluble. If parking could be removed form one side of Western Avenue, a contraflow bike lane would be an option.

There is no such issue on River Street, because there are many parallel streets in Cambridgeport that allow travel in the opposite direction.

Signing off…

October 29, 2010

Burning bridges

Filed under: Cambridge government,planning — Tags: , , , , , , , , — jsallen @ 8:59 am

I have removed my most recent post.

Though it was factual — and passed muster with Robert Winters, who manages this forum — it did not address the main issue that motivates me to post here: my intense frustration with some directions which the Cambridge bicycle program is taking. My post was an expression of frustration rather than a description of current issues, and as such, it created more heat than light.

In the post, I asked whether Jeff Rosenblum was a builder of bridges. I think that was a fair question, but on the other hand I have burned some, and not only with him. I am no longer a member of the Massbike Technical Advisory Committee. Executive Director David Watson had already explained to me that my presence on that committee was getting in the way of Massbike’s work with governments. My recent post was the last straw for him.

I had already considered resigning for a couple of months. I regret that I did not have the courage to ask for a resignation. Instead, I backed myself into this situation. In the light of some of my posts in this forum, it may come as a surprise to my readers, but confrontation does not come easily for me. Sometimes I do not manage it well, and it bursts out.

Massbike and its predecessor organization, the Boston Area Bicycle Coalition, have been a major part of my life over the years. I have been on the Board of Directors, been President, attended hundreds of meetings and public hearings, written large reports under contract. I part from Massbike with considerable regret. On the other hand, I am also feeling much relief with this change. I had become increasingly frustrated with some directions Massbike is taking. I was increasingly uncomfortable as a member of the Technical Advisory Committee, and Massbike leadership was increasingly uncomfortable with me.

My underlying drive, my lifetime quest, as I must acknowledge to myself, is as a journalist. When I see something that disturbs me, my primary instinct is to provide information, to explain my concern, to try to make it understandable to other people. I am highly uncomfortable with biting my tongue in the interest of political expediency and compromise.

I have now freed myself from that obligation as it involves bicycling issues in Massachusetts, and so I think I will now be able to do a better job here on this forum. I offer my heartfelt thanks to Robert Winters for hosting this forum and for his support.

I’ll sign off with a quote, which I think is apt:

“The basis of our governments being the opinion of the people, the very first object should be to keep that right; and were it left to me to decide whether we should have a government without newspapers or newspapers without a government, I should not hesitate a moment to prefer the latter. But I should mean that every man should receive those papers and be capable of reading them.” –Thomas Jefferson to Edward Carrington, 1787. ME 6:57

October 27, 2010

Western Avenue proposal: ill-considered

Filed under: Cambridge government,cycling,planning — Tags: , , , , , , , , , , , — jsallen @ 12:35 am

Cambridge has posted its preferred design proposal for Western Avenue.

Conceptual Design Selection booklet, October 2010. This NEW booklet details the current draft proposed conceptual design. Online/ download: http://www.box.net/shared/g4hl7zupht

Conceptual Design roll-plan. This shows the draft proposed conceptual design in plan form.
Online/ download: http://www.box.net/shared/9emm0tq29j

Neighborhood Walk this Thursday, Oct 28, 5:30pm, Andala Cafe, 286 Franklin Street

Community-wide Public Meeting, Wed Nov 3, 7:00pm (open house 6pm), Cambridge Senior Center, 806 Masssachusetts Avenue.

Cambridge continues with its plan to slow traffic by making streets narrower, and so more stressful and hazardous for motorists, while moving bicyclists onto glorified sidewalks where it is difficult or impossible for crossing and turning motorists to see them. The repeated invitations for right-turning motorists to turn across the path of through-traveling bicyclists in this proposal leave me breathless, especially where groups of pedestrians will wait on a bulbout, concealing through-traveling bicyclists. Also, the proposed cycle track will greatly encourage contraflow bicycle travel without making any reasonable or safe provision for it. If you have any doubt about the hazard of contraflow travel on a bicycle sidepath, here’s a link to a study which addresses it. There also will be the same issues of snow clearance as already occur on Vassar Street. It is predictable that bicycle-pedestrian collisions will be a problem, as they have been on Vassar Street.

The word “protected”, in traffic engineering used to mean, for example, a left-turn traffic signal phase where opposite-direction traffic had a red light.

Now in the Cambridge proposal it is being used to mean “motor traffic turns right across through bicycle traffic, with interrupted sight lines and no traffic signal.”

The word “protected” sure sounds good, if you don’t know that the treatment under discussion results in increased crash rates.

“Traffic calming” in very ancient times (50,-100 years ago) used to mean traffic-law enforcement. Despite the availability today of efficient tools such as license-plate cameras to record speeding and traffic-signal violations, Cambridge chooses a hardware solution — narrow lanes, which make for more stressful, difficult and dangerous driving conditions — to address the software problem of poor motorist behavior, and emphasizes the point by using bicyclists as obstacles.

Cambridge’s message to its motorists, delivered by creating an obstable course: drive real slow, and look back over your right shoulder when you turn right, or you might kill one of our highly valued and highly vulnerable bicyclists, and it’s all your fault if you do, because, you see, they are protected.”

Please don’t peg me as a naysayer. I made suggestions for alternative treatments in an earlier post, which led to a lively and welcome discussion.

Also see Paul Schimek’s post on this blog.

I hope to see good citizen participation at the public events.

Your comments on this post are welcome too.

August 15, 2010

Construction detour at Mass. Ave. and Alewife Brook Parkway

Filed under: Cambridge government,cycling,planning — Tags: , , , , , , , , — jsallen @ 8:20 am

I attended a Livable Streets StreetTalk event on August 4, at which the city of Copenhagen, Denmark was praised for, among other things, always providing a good detour for bicyclists during construction projects.

Only a couple of days later, I got a report from a cyclist who had attempted to take Massachusetts Avenue across Alewife Brook Parkway (Route 16) , and found that the official detour was on Alewife Brook Parkway to Broadway in Arlington — circuitous, and Alewife Brook Parkway has to be one of the least bicyclist-friendly roads in the area. The detour apparently was in effect from 8 PM till 5 AM each night. I don’t know how for how many days this situation continued.

A quote:

It took over 5 minutes for them to stop the 16 traffic and let the Mass Ave traffic go…there are different people out there every day from 5 different agencies. I was not looking for special treatment, just direction when out there as to what the cops wanted me to do. I ended up scooting up the traffic for the last 2 blocks on the sidewalk (because of the lane closing) and waited with many pedestrians at the corner for an extended amount of time until they let the rest of the traffic go and did not try to give us a safe way to cross. I had to cross onto the sidewalk and then get onto the road further down. It took over 5 minutes for them to stop the 16 traffic and let the Mass Ave traffic go.

If Cambridge can’t get something as basic as this right…?

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