bicycling at 21st St & I St

This is Central City Mobility Project update #14.

When bicyclists using the separated bikeway on 21st Street come to I Street, they are left without any bicyclist facilities at all, in a hazardous situation. The city intends to install a bikes-only signal here to allow bicyclists to proceed when motor vehicle traffic is not moving, but until at least late July, bicyclists are on their own. See the previous posts where the bike lane ends – update and where the bike lane ends for background.

The city has recommended, in the information sign on 21st St approaching I St, that bicyclists cross I Street using the pedestrian signal. I recommend otherwise. The double left turn general purpose (motor vehicle) lanes from 21st Street northbound to I Street westbound encourage drivers to make high speed turns, with no attention to other roadway users, while the pedestrian signal shows the white walker. This was a serious problem before the reconfiguration of 21st Street, but now is worse because not only are walkers are endangered, but now bicyclists as well.

I recommend looking for gaps in traffic from 21st Street southbound (21st is two-way north of I Street with much less traffic and much lower speeds) and I Street westbound (I Street to the east is a two-way street with much less traffic and much lower speeds), and cross against the red light. Illegal, yes. But safer to be making an illegal move than competing with drivers turning left on the green light.

This intersection could be made safer in the meanwhile by two city actions: 1) Create a separate phase for walkers crossing I Street on the west leg, where the signal remains red; and 2) Prohibit left turns on red at the signal. Since this is a one-way street to one-way street turn, it is legal to turn on red, unless posted otherwise. The advantage to prohibiting left turn on red is that it will allow bicyclists to only pay attention to two opposing traffic movements rather than three. It will be necessary to prohibit left turns on red when the bike signals are installed, so why not do that now? There is a ‘left turn yield to pedestrians’ sign here, but it is small and mounted high up, so unlikely seen by drivers. Drivers may reasonably expect walkers crossing at slow speed, but are not expecting bicyclists crossing at much higher speed. It’s why bicyclists are discouraged from riding crosswalks, and why the city is wrong to be encouraging such behavior here.

21st St & I St bicyclist crossing sign
21st St & I St bicyclist crossing sign

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