The Sunset bridge area will be closed tonight 10 PM until 6 AM tomorrow. The folks in charge of the project actually did the same thing last night. And I can tell you from personal experience last night that they thought it was OK to direct lots of traffic to a dead end and then let drivers figure out how to turn around. So stay away.
[youtube http://www.youtube.com/watch?v=dYdr-MslXkw?feature=player_detailpage]