LOS ANGELES (CBSLA.com) — Los Angeles residents and officials prepared for this year’s Carmageddon on Thursday, which runs the weekend of Sept. 29-30.

Caltrans and Metro officials joined the California Highway Patrol, the Los Angeles Police Department and other agencies at the Skirball Cultural Center to address community questions and concerns surrounding the next chapter of the Sepulveda Pass Improvement Project.

Here’s what drivers need to know:

  • The northbound 405 between the 10 and the 101 freeways will be completely shut down.
  • The southbound 405 will be closed from Burbank Boulevard north of the 101 all the way down to the Getty Center Drive on ramp.
  • While the Sepulveda Pass is the main detour route with no lane closures, officials warn it could get saturated and advise to stay clear of it.
  • The Sunset Bridge will be open, but the Skirball Bridge will be closed.
  • Canyon roads and cross mountain traffic in the Valley will be heavily patrolled by LAPD.
  • Officials recommend the 710 freeway as an alternate for drivers.
  • Stay home or travel with a bike or use the Metro, if necessary.

During the weekend closure, there are extra resources in place to ensure public safety and contingency plans for any emergencies, like earthquakes or fires.