SAN FRANCISCO - A jack-knifed big rig stalled traffic for hours early Thursday morning, tying up traffic for those wanting to head from San Francisco to Oakland on the upper deck of the Bay Bridge.

causing the big-rig to jack-knife across the four left lanes (#1-4), now facing the opposite direction of I-80 e/b, just E/ of 1st St. on-ramp, on the SF/Oakland Bay Bridge. pic.twitter.com ...