How many times have you had to ram the car brakes because someone on a bicycle blew through a stop sign? Or, since bicyclists outnumber drivers in SF during some parts of the day, and can be a little menacing on Critical Mass days, I should ask it the other way: if you confess you ignore stop lights and signs on your cycle, and I've seen it happen a million times, how often have you almost been taken out by a car that expected you to behave like a motorist?

What are the stopping rules, anyway? Are they the same for motor and non-motor? Do enough people know that it matters? Should they be different when we're all sharing the same asphalt?

The SF Metropolitan Transportation Commission is considering today, even as we post, a "stop and roll" rule for cyclists. That means, I gather, that you still have to yield to a car at a stop sign if you see one and stop only momentarily at a red light. So, it's like a yellow light. Only it's red for everyone else. Got that?

This blog originally appeared on sfgate.com. To read the rest, click here.