There are two events of interest to Muni this weekend: Critical Mass tonight at 6, and Supercross Saturday at one of the baseball parks. Both events are dedicated to the elimination of automobiles, but only one will actually accomplish its goal, while the other will just be a noisy, irritating echo chamber. Muni will be running extra trains to accommodate the Supercross crowd. The extra trains will stop running at 10pm, which is a......

Muni driver is no longer with us, but that doesn't mean the questions won't keep coming. Reader RK sent us this last week and his completely frustrating experience is something we've all been through. And just why do they sometimes stop trains in the middle of the run anyways? And why can't drivers at least tell everyone why? ...

We're just trying to spare you some panic tomorrow morning, folks -- if you hear bells and sirens at 5:12 a.m., no need to wonder about the cosmic coincidence of an earthquake striking exactly 100 years after the big one of 1906 -- it's just Gavin Newsom, who's ordered that all fire stations and churches ring their bells and sirens after the moment of silence at Lotta's Fountain that traditionally commemorates the 1906 quake. (We must confess, though, that we're now wondering what'll happen if, by some weird cosmic coincidence, an earthquake does strike exactly 100 years later.) If the thought of an early morning alarm clock gets you so irritated that you're just not going to sleep at all, you might as well head on down to the intersection of Kearny, Market, and Geary, to attend the centennial celebration in person. The party starts at 4:30 a.m., and MUNI will run free shuttle buses from St. Francis Circle (you know, where the K, L, and M emerge from the ground) starting at 3:00 a.m., allowing themselves two hours to get you there 30 minutes late. MUNI will run free trains all day Tuesday as well, and all stations (except Civic Center) will open early. We feel bad for the eager early morning people who miss that message and are pounding futilely on the metal grates at UN Plaza. And finally, MUNI, always forward-thinking, warns you of "likely delays" crossing Market Street at 9:30 a.m. due to the centennial parade. BART will run a Centennial Train from West Oakland into SF at 4:15, and the regular 4:09 Daly City train to Pittsburg will run as well. They also use this opportunity to remind you that they're working on retrofitting the Transbay Tube. ...