All southbound lanes of 880 at Broadway in Oakland are closed after a big rig crash. Drives are advised to use I-580 eastbound until further notice. Word is that said big rig is leaking loads of diesel fuel too. Oy. Stay tuned for more updates as they come to us.......

Although BART service has been restored -- a technical SNAFU cut off service between the Montgomery BART station and Daly City -- you can expect delays throughout the morning. According to BART spokesman Linton Johnson, "delays throughout the system are expected and service through San Francisco is limited" for the next few hours. Good morning! (SFGate)......

TODAY: Critical Mass, 6 p.m. Bicycle ride will begin from Justin Herman Plaza and end all up in your face. You've been warned. SUNDAY: Hairrison Street Fair/Bear Week, 11 a.m. to 6 p.m. Large homosexual men, who think of themselves as a minority of sorts, will have a big ol' party in SoMa. That means these streets will be closed during that time: Harrison from 11th Street to Division, 12th Street from Harrison to......

Photo by SFist's Jonathan Hunt According to KTVU's Gasia Mikaelian, a fire on Yerba Buena Island is affecting traffic on the Bay Bridge. It's on the west side of Yerba Buena just under the bridge. It is not inside the tunnel, you see, but on the vegetation on the hill. So far one lane is blocked on the southwest side of the bridge. You might want to re-plan your commute home; there's no guess......

As incredible as it sounds," says the regally named Nathaniel P. Ford, Sr., SFMTA's Executive Director, in this morning's glowing press release, "preliminary ridership reports show that Muni had over 117,000 additional boardings this weekend, which included three Giants games at AT&T Park and the Outside Lands Music and Arts Festival in Golden Gate Park on opposite ends of The City." Over 117,000 additional boardings? Oh my. Anyway, Muni is patting itself on the......

A cracked rail at the Lake Merritt BART Station will cause delays all say long, possible lasting well into the evening. According to ABC 7, the "hairline crack is inside the Oakland Y - the underground maze of trackway where all five lines converge." This means you can expect up to 30-minute delays since it's forcing trains to use single track. Plan accordingly. UPDATE: Damn you, ABC 7 news team. You made it sound like......

Tom Vanderbilt, why have you forsaken us? The author of the recently published Traffic: Why We Drive the Way We Do (And What It Says About Us) is on the west coast at this very minute doing "lots of media" and guest-blogging for Powell's Books. But NOT appearing in San Francisco. As far as we know. What, traffic not bad enough on Market St.? 880 moving too smoothly for you? Guest-blogging for Modern Times not......

According to AlertSF, "Be advised, the westbound lanes of the Masonic Tunnel on Geary Avenue have been closed temporarily. Timetable for re-opening unknown." Will update as soon as we know more. Plan your ride home accordingly. (Sent to SFist at 3:56 p.m., 8/6) Update: All lanes are now open.......

TONIGHT: Critical Mass starts tonight at 6:00 p.m. As always, the Critical Mass bicycle ride will begin from Justin Herman Plaza and sprout throughout the city. SUV drivers beware! SATURDAY, SUNDAY: The North Beach Jazz Festival will land in Washington Square Park. Can you dig? And Union Street (from Stockton Street to Columbus Avenue) will be closed from 7:00 a.m., Saturday to 9:00 p.m., Sunday night. The following bus lines will be affected: 9X......

Oh oh. Looks like your commute home might be an exciting one filled with delays and packed trains. According to 511, "at 3:10pm, Muni reports all inbound and outbound lines on the underground Metro system are experiencing delays due to the evacuation of the Van Ness Station and police activity. There are no further details at this time." Will update as we know more.......

All but one southbound lane of Highway 880 in San Leandro has been shutdown after a big rig accident occurred around 9:30 a.m. this morning, near the Marina Blvd. exit. it seems that the big rig "crashed while attempting to avoid a vehicle fire," says CBS 5. In addition to fuel spilling across the northbound lanes, two people died during the crash. No word yet as to when it will reopen.......

We received word this morning that a collision, possibly a motorcycle-meets-Muni accident, is blocking the T and K lines near Bayview. 511 has this to say: On Thursday, June 12th at 8:10am, MUNI reports a collision blocking the K/T line at 3rd and Evans Streets requiring motor coach shuttles between Fourth-King and Third-Evans until further notice. It seems a motorcycle, according to an SFist reader, allegedly "slid under a diesel truck blocking north bound......

Update (3:54 p.m.): The entire bridge has been shut down, says Frank Sommerville. Also, someone is trapped inside one of the heavily damaged cars. Head-on collision is Sommerville guess. Yikes....

Yesterday's accident on the Golden Gate Bridge, which resulted in a 10-car collision and the bridge shutting down for a couple of hours, was the result of a simple lane change gone awry. According to the California Highway Patrol, a "pickup truck veered into the path of another car traveling north, causing both vehicles to swerve into southbound traffic." And then all sorts of messy chaos ensued: cars went flying into on coming traffic, metal bent, a baby was hurt, a Honda Shadow flipped over, and more. Fortunately, and strangely, no one was killed. ...

All Southbound lanes are closed, and most northbound lanes are "moving very slowly" due to a motorcycle accident involving multiple cars on the Golden Gate Bridge this afternoon. Traffic is backed up to 19th Avenue according to CBS 5 (where Allen Martin had the unmitigated gall to interrupt The People's Court to tell us!) CHP advises motorists to expect big, long delays. Use alternate routes tonight, folks. Update: Six people are injured, one of......

State Senator Leland Yee introduced a bill in the State Legislature this morning that, if passed, would see traffic fines double for violations occurring along the deadly strip of San Francisco road known as 19th Avenue. (Shudder.) Over the past few years, 19th Avenue -- which connects San Mateo County with San Francisco and pierces commercial and residential sections of the city rife with foot traffic -- has played host to numerous traffic accidents......

Is there anyplace in San Francisco more charming than SOMA at night? No, there is not. And this President's Day, it'll be even charminger: construction and traffic reroutes on the Bay Bridge may cause a few heavy-flow days over the holiday weekend. If you're clever, you'll probably want to avoid SOMA in the late-night and early-morning hours. But then again, if you're clever, you probably already do. But it's not all blocked onramps and......

Muni has three disruptions on their radar this weekend: The Chinese Flower Market Fair on Saturday and Sunday, the San Francisco Half Marathon on Sunday, and the Tet Fesitval Celebration on Sunday. All three sound scrumptious, even though only two of them are explicitly Asian. After the jump: details! Yummy delicious details.......

Due to a gasoline tanker truck accident -- which resulted in an eco-unfriendly dousing of over "26 gallons" (?) of gasoline, or so said CBS 5's Judge Judy breaking-news interruption -- all northbound and southbound lanes on Highway 101 in Redwood City are closed. That? Blows. It seems that a 26,000 gallon gasoline tanker big rig overturned just north of Maple Street near Woodside. According to ABC 7, a "Coast Guard crew is heading......

A slow-moving daily parade of idling vehicles stretching up Masonic Avenue...

Yesterday's near perfect weather is now but a sepia-toned memory. Reports of a strange, icy substance, often referred to as "snow," is falling on Mount Diablo, Mount Hamilton in Santa Clara County, Mount Hamilton, and (any minute now) Mount Tam. It's also blanketing the eerie Santa Cruz Mountains, resulting in the closure of Highway 9. It looks like many of you will have to take Highway 17. If you dare. Oh, and be sure......

Because you can't go home. One of our guilty pleasures during storms is sitting around and looking at live traffic updates to keep track of the mayhem. We snapped this screenshot just now. Accidents and incidents literally every minute? We'd be glad we're taking MUNI except that it's closed at Market at 3rd... Anyway, as far as we can tell, if you live in Marin and work in Contra Costa, or vice versa, you can't......

You know on Market Street how there's that left-hand turn lane if you want to go on Valencia? And you know how everyone likes to rush through when the light turns green to make sure they can get onto Valencia without having to wait through another cycle of traffic signals? We know what you're thinking everytime you make that turn-- hey, what an awesome place to jaywalk! Which is what some woman, latte in hand, did right in front of us as we tried to make that turn in rush hour....

In the tussle over the mantle of San Francisco’s Most Tucked-Away Neighborhood, Visitacion Valley gets our vote...particularly if by “tucked-away,” one really means “neglected.” Geographic and economic isolation have contributed to infrastructural decline - and crime - here for quite some time, although earnest efforts are being made these days to turn the tide. The block of Leland between Peabody and Rutland is dually zoned for business and residence, so the street is one of Viz Valley’s main drags. There’s plenty of foot and auto traffic here, and the 56 Rutland bus even shuffles by on occasion. Businesses bookend the nondescript strip as post-WWII housing, other small commercial concerns, and a pair of bottlebrush trees fill in the space between. Pretty? Not quite. But, utilitarian? Sure....

We've got rain, and we've got fire: two blazes within about twelve hours of each other in SF. The Globe restaurant in downtown will be shut down for a few weeks for repairs, after a one-alarm fire last night. The fire department says the fire was started by grease stuck in the restaurant's flue. Also, this morning, the SFFD is fighting a fire in an abandoned building on Mission and 7th that's threatening their own......

A grown man died during a street race in Oakland last night at around 9:30 p.m.. The unidentified 42-year-old -- that's right, 42-year-old -- was racing his 2005 Nissan "west on the 7100 block of Doolittle Drive, near Oakland International Airport" before losing control of his vehicle. He then slammed head-on into a non-compete Hyundai, which sent the 57-year-old driver of the former car to the hospital with serious injuries. Oh, and Ms. Lagos......

Hey, look, it's back! It's "Ask a Muni Driver!" But we need help from you-- we need questions. So, if you got any, let us know at jon@sfist.com. ...

Due to the traffic backup caused by yesterday's fatal car crash on the Bay Bridge, it seems that a woman popped out a kid. According to the Examiner: As a result of the traffic jam, a woman pulled off the road to give birth a few hours after the accident. The mother-to-be was traveling toward San Francisco at 3:35 p.m. when she detoured into the toll plaza’s left administrative parking lot, Chase said. Wow.......

In the last two days we have witnessed 1. a pane of glass spontaneously shatter and fall from a building on Bonifacio. 2. a dramatic roof arrest of some dude who looked to be playing invisible tennis on Rizal. 3. a crazed man screaming in the middle of Harrison (at Lapu Lapu) while dodging oncoming traffic. Not to mention the drive-by shooting that took place the other night right outside SFist headquarters on Stillman. What......

Update: all lanes are now open. It seems that "a box truck, from a business called 'Diet to Go'...drove directly into the back of the big rig," killing the box truck driver. Very sad. Sigh. According to SFGate, "three lanes of the upper deck of the Bay Bridge are blocked by a fatal accident, the California Highway Patrol says." Did you hear that? How awful. Just terrible. Three whole lanes of traffic have closed......