On transit streets like Haight, the SFMTA is looking to install transit-priority traffic signals to speed up Muni. But are they worth it? Photo: torbakhopper HE DEAD/Flickr
On Tuesday, the SFMTA Board of Directors approved plans to add traffic signals and bulb-outs along Haight Street, which could speed up Muni’s 6 and 71 lines and improve pedestrian safety. The approval came despite complaints from some Upper Haight merchants over removing parking for bus bulb-outs, and mixed support for new traffic signals from pedestrian safety and transit advocates.
Under Muni Forward’s “Rapid” plans for the 71, almost all stop signs along Haight will be replaced with either transit-priority traffic signals, or two-way stops combined with traffic calming treatments. The signals, which stay green when they detect buses, would be installed at Clayton, Baker, Broderick, Scott, Pierce, and Buchanan Streets. Either a two-way stop or a new signal would be possible at Shrader, Central, Webster, and Laguna Streets.
Muni has similar plans for Muni’s 5-Fulton and for other routes under Muni Forward, which previously was called the Transit Effectiveness Project. SFMTA planners say Muni riders stand to save a lot of time thanks to the new signals, combined with a relocation of bus stops from the near side to the far side of intersections. The SFMTA claims it takes an average of 18 seconds to clear a stop sign, counting deceleration, queuing behind cars, and acceleration.
But the speed benefits of signalization are contested by Michael Smith, the former Chief Technology Officer and General Manager of NextBus, who co-founded Walk SF. SFMTA staff have not responded to his challenge to their estimates — neither to a request from Streetsblog, nor at the board hearing — but street safety advocates say that they might not justify costly signals, which restrict movement for people walking and biking (in this case, on the Wiggle). “MTA hasn’t convinced neighbors and pedestrian advocates of that,” said Livable City Executive Director Tom Radulovich.
“All of these proposals are great, but traffic signals are questionable,” Smith told the SFMTA Board. He presented data [PDF] he said he collected by riding the 71 with a timer “for several hours,” showing that delay times at stop sign intersections on Haight aren’t close to the 18-second estimate.
Based on his analysis, Smith concluded that most of the proposed signals would only save a few seconds, if any, and that the busy Scott Street intersection is the only spot that justifies a signal.