Updated 5:16 p.m. with corrections on the number of blocks.
The SFMTA is moving forward with a plan for Polk Street with a protected bike lane only in one direction of an 11-block stretch. SFMTA planners and Supervisor David Chiu maintain that the plan is sufficient to make the street safe enough to invite a broad range of San Franciscans to bike, though the design has been guided less by safety considerations than the desire to appease merchants who oppose the removal of any car parking.
Under the “preferred” plan presented [PDF] to media and stakeholders today, nine of the 20 blocks in the project (between Union and California Streets) will have a conventional, green-colored bike lane in the southbound direction only, placed between parked cars and moving cars. Northbound, curbside parking will be banned to make room for bikes during morning commute hours only. At other times, the only provision for cycling will be green-backed sharrows in the traffic lane.
In the southbound direction from California to McAllister Street, Polk will have a raised, protected bike lane. The northbound direction will have a buffered, green bike lane that, depending on the block, will run either curbside (without parking) or next to the parking lane.
Altogether, the plan would remove an estimated 30 percent of parking on Polk, or 8 percent of parking within a block of the street. On the stretch of middle Polk between Union and California, where opposition to parking removal was strongest, those numbers are 10 percent and 5 percent. Many of the parking spaces would be removed for sidewalk bulb-outs and other non-bike lane improvements, planners said.
When Chiu was asked whether he thinks the plan would make Polk bike-friendly enough for a mother to feel safe riding with a child — a vision which he has promoted to pro-bike crowds, but hasn’t supported when it’s politically risky — he said yes.
“The solutions that the MTA is proposing really moves to the next level on both of these sections for the biking experience, whether it be for young people all the way to seniors,” Chiu said. “I do think that this moves forward the biking vision for the city.”