Luke BornheimerWhat’s it like to live on a “residential” street in San Francisco?
4,000+ cars and trucks per day (metrics measured between 6 AM and 8 PM only)
This is policy and infrastructure failure.
This “residential” street is also a common route for people on bikes.
@NACTO’s guidance for all ages and abilities bike facilities states this street should have a protected bike lane.
Currently, people on bikes are required to “share the road” with cars.
Navigation apps (e.g. Waze) have resulted in residential streets being used as cut-throughs at all hours.
Transportation agencies (e.g. SFMTA) need to implement policy and infrastructure to fix this issue, make residential streets safer / more livable, and fight climate change.
Turns out there are even more cars/trucks!
Second day had 4,600+ cars and trucks during daylight hours (when the sensor can properly count), so the street likely has more than 5,000 cars and trucks per day.
This is unacceptable for a residential street; SFMTA should address it.
A holiday weekend shows this “residential” street sees 4,000+ cars/trucks per day even on weekends and holidays.
Meanwhile, the V85 speed — the speed of the 85th percentile of all cars/trucks — is ~25 mph, despite >6% of drivers going over 31 mph, highlighting an issue with V85.
SFMTA is using an even worse metric — “median speed” (or V50) — for Slow Streets, making Slow Streets more dangerous for people and ineffective at getting people to shift trips to active/sustainable modes (e.g. bikes). SFMTA should use V95 to make Slow Streets safe and effective.
Paul Wermer, CC BY-NC-SA 4.0@LukeBornheimer and of course it's that tail of increased speed that really really increases risk: higher speed means both less time to react (so more likely to collide) and damage is more severe.
But stats on median speed look so comforting, why scare people by pointing out the higher risk segmen
lisa c@LukeBornheimer this is crazy. My street is one of the residential streets that has been greatly changed by the Uber and Waze apps. There used to be not too much traffic and now it's bumper-to-bumper during rush hour. I can easily count 30–40 or more cars rolling the stop sign where I wait for the cable car in 30 minutes or so.
stevenray@LukeBornheimer is this a specific street or a median value, Luke? Thanks.
@stevenray A specific street (15th Street).
@LukeBornheimer thanks much.
@stevenray You’re welcome!