Tag: gutter pan

19th St gutter fix

Dan AllisonLeave a comment

This is Central City Mobility Project update #20.

Apparently it does help to complain, at least sometimes. The city is fixing the root heave and gutter on 19th Street between Matsui Alley and N Street, which I posted on recently (hazardous bikeway on 19th St). I had submitted several 311 reports on this issue, and so had other people, and it seems we got through to Public Works.

The gutter is being replaced at the root heave, and other deteriorated locations in that half block. The photo below shows a night-time view, and I’ll add a daytime view and a view when the project is complete. Note that the bikeway is being appropriately diverted into the parking lane. It is unusual for the city to provide an equivalent accommodation for bicyclists.

gutter fix work on 19th St bikeway between Matsui Alley and N St
gutter fix work on 19th St bikeway between Matsui Alley and N St

Of course there are several more blocks on 19th Street where the gutter pan is deteriorated enough that it doesn’t provide a bikeway surface and the bikeway therefore does not meet standards. However, this was the worst and most dangerous location, so there is progress.

14 foot lanes

Dan Allison1 Comment

There has been a discussion on the Association for Pedestrian and Bicyclist Professionals (APBP) listserv for the last two weeks on what to do with an outside lane of 14 feet (without on-street parking), particularly when there is a seam between the asphalt pavement and the gutter pan. Several people encouraged the use of narrow, substandard bike lanes in an effort to get something on the street, rather than using sharrows in the wide lane, or just leaving the lane unmarked. I believe we need to be very careful to not create “bike lanes at any cost,” and to carefully consider the actual roadway conditions before specifying anything that does not meet or exceed standards. The diagrams below are from the NACTO Urban Bikeway Design Guide. The first shows a high quality bike lane adjacent to a curb; the second one shows sharrows rather than a bike lane where there is not sufficient roadways width.

bike lane adjacent to curb (right side): NACTO Urban Bikeway Design Guide
bike lane adjacent to curb (right side): NACTO Urban Bikeway Design Guide

shared lane markings adjacent to curb (left side); NACTO Urban Bikeway Design Guide
shared lane markings adjacent to curb (left side); NACTO Urban Bikeway Design Guide

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