Cambridge Civic Journal Forum

February 21, 2017

Black ice blindness

Snowmelt drains across "protected" bikeway on Massachusetts Avenue in Cambridge

Snowmelt drains across “protected” bikeway on Massachusetts Avenue in Cambridge

The photo is of a stretch of barrier-separated bikeway recently installed on the north side of Massachusetts Avenue between Sidney Street and Douglass Street in Cambridge. The headline of the February 17, 2017 Boston Globe article with this picture is “Snowbank becomes accidental hero for area cyclists”.

But — the shiny area in the bikeway is meltwater from said snowbank. When the temperature drops, the water freezes into a sheet of black ice. The usual drainage techniques don’t work here because, if you will excuse me for belaboring the obvious, the “hero barrier’ is uphill and water runs downhill. I discussed bikeway drainage issues in more detail recently in a post on another blog and years ago in connection with the 9th Avenue bikeway in Manhattan. Just to make it clear, I do have  nice things to say about other features of the 9th Avenue bikeway.

Neither Steve Annear, author of the Globe article, nor anyone quoted in it, makes any mention of the black-ice problem. They are all enthusiastic about the snow-barrier.

From the article: “I like this snowbank-protected cycle track,” Ari Ofsevit, a local cyclist, said on Twitter.

Ari is more than just a “local cyclist”. He widely, imaginatively and thoughtfully discusses transportation improvements his blog. I usually agree with him, except when he turns a blind eye to problems with barrier-separated on-street bikeways.

The article cites Joe Barr. Director of Traffic, Parking, and Transportation for the City of Cambridge:

Barr acknowledged that the snow mound separating the bike lane and the road has offered a sense of protection to cyclists, but he said it could also be masking damage to the base of the flexible posts.

“We won’t know that until we get some more melting. But it certainly looks good on the street,” he said.

And Richard Fries, Executive Director of the massachusretts Bicycle Coalition, commented:

It’s great. It won’t last that much longer, but it does help to hammer into people’s heads [road] patterns and driving habits,” he said. “Because it’s there, it makes the existing bike lane more visible to drivers and more prominent.

Segregation promotes a sense of entitlement on the part of the majority group –in this case, motorists. How do I explain to horn-honking motorists that I have to ride my bicycle in “their” travel lane, now narrowed to make room for the barrier, to avoid crashing on a sheet of black ice?

Or for that matter, to travel at my usual 15 miles per hour so I’m not stuck behind a cluster of bicyclists who are traveling at 8 miles per hour?

Or to avoid being right-hooked and crushed under the back wheels by a right-turning truck where the bikeway ends at Douglass Street?

Just asking.

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