Rachel Gordon of the (soon to be extinct?) SF Chronicle reports that the SF County Transportation Authority voted yesterday to study the effects of restricting cars on Market, between Van Ness and the Embarcadero.
According to Gordon the study is to be finished in three months and will provide a comprehensive analysis of the effects of banning cars outright, or of limiting their access in other ways.
The comments on that article on SF Gate are as divorced from reality as comments on that site usually are, so I wouldn't recommend reading them unless you want to frustrate yourself. But I would definitely encourage everyone who reads this to write a letter to the editor of the Chronicle expressing support for the study, and for a car-free Market Street. You can email your letters to email@example.com. From experience I can tell you that your letter stands a decent chance of getting printed, and it will influence the dialogue about the issue.
Just for fun, here are a couple of simulations of what Market Street could look like with fewer cars or no cars. These simulations were created by a transportation engineer named Gregory Riessen, but it's not clear if they were done as part of any specific plan or study, or just for fun: