Hey Westside, 20 Months of Traffic Hell Begins Tonight

When the bridge is completely closed, drivers going eastbound can use Barrington or Kenter/Bundy to San Vicente to reach Wilshire. Westbound drivers can use either Veteran or Hilgard to Wilshire.
Tonight begins the end of traffic exasperation and the start of traffic hell. Metro and Caltrans are embarking on a major project to bring the Northbound 405 Freeway a carpool lane at the same time retrofitting bridges that cross it up to current standards. The Sunset Boulevard bridge begins tonight.
Tonight all lanes on Sunset between Gunston to Thurston weill be closed for restriping from 10 p.m. to 6 a.m. On- and off-ramps around Sunset will also be closed, some of them starting at 7 p.m.
The best way to keep track of closures is via the project's Twitter account @I_405. They also have a Facebook page and a website.
Background Reading: Steps to Tear Down Sunset Boulevard Bridge over 405 Freeway Begin Friday