New post on http://twitter.com/caltransdist3 : EB I-80 at Madison lanes 4,5 & 6 are blocked due to four vehicles and a big rig crash. First responders are on scene. The backup is two miles long, lanes 1,2 & 3 are open pass with caution. No ETO. http://pic.twitter.com/x7IwOae5Tx