The Golden Gate Bridge was closed in both directions following a head-on crash that happened around 3:15 pm.

Update 5:05 pm: Lanes have just reopened. Nevertheless: Check traffic conditions before heading that way.

Following the jump, the gory details.

Message/Item Delivered Ggb 3:15 PM
6 Vehicles Involved Blocking All 3 Lanes 3:15 PM
Message/Item Delivered Ambulance Required Oo National Parks 3:15 PM
2 Vehicles, Fire Extricating 1 Party 3:20 PM
**sig Alert** N/b 101 S/of Vista Point Lanes Blocked for Traffic Collision Fire on Scene Attending Injuries Unknown Eto Log #1360 3:23 PM
Message/Item Delivered Dotcc 3:26 PM
Media Inquiring About Lane Closure When Unit Can Advise, Thanks S-Alert Issued 1523 3:28 PM
2 Parties Trapped in 1 Car, 1 Party Trapped in Another, Possible Accident (Major Injury) at this Time Per 20 M 3:29 PM
Message/Item Delivered Dotcc 3:30 PM
Rway Closed Both Dir, See Lane 12 Also 3:30 PM
**sig Alert Update** All Lanes Both North and South Closed at this Time Due to Traffic Accident Unknown Eto 3:31 PM
**sig Alert Update** Alternate Routes for 101 South Use 580 to 80, for North Use the Bay Bridge to 580 3:35 PM
Late Entry Message Sign S Activated Advise Use Alt Bridges 3:37 PM
FYI Line 16-17 Getting Calls Inquiring About Closure 3:38 PM
CHP Unit Enroute 3:39 PM
CHP Unit on Scene 3:52 PM
CHP Unit Assigned 3:52 PM
CHP Unit on Scene 3:53 PM
CHP Unit Enroute 4:00 PM
---Traffic is Starting to Do U Turns Near Lombard St 4:03 PM
Bcst Lane 22 4:04 PM
**sig Alert Update** Approx Eto for Opening Traffic North and South 101 on Ggb 30 Min Log#1360 4:06 PM
L2 Cpys All Lanes Open 4:24 PM
All Lanes Open Nb/sb 4:24 PM
**** Sigalert Update All Lanes Open North and South Heavy Traffic Backup 4:26 PM
Message/Item Delivered Ambulance Required Advise D Airlifted to Trauma Center 4:29 PM
Animal Control Advise Stuck in Traffic on South Side 4:33 PM
Animal Control Ll Stuck in Traffic / Were They Called Out for this 4:33 PM
Animal Control Copies Lane 40 4:34 PM
Medical Assist Dog at Sgts Ofc at Tp 4:34 PM
Regarding Lane 33, Affirm, See Lane 36 Also 4:44 PM
Mso Advise Getting Calls of Vehicles Turning Around and Driving North in the South Lanes at Marin City to Avoid this Traffic / Exiting at Marin City 4:47 PM