From LA County Sheriff, and LA County Public Works…
Beginning approximately January 15, 2015 Malibu Canyon Road will be closed from 9 pm 5 am every night while under construction. Los Angeles County Public Works is undertaking this massive 7 month project in order to improve the tunnels interior lining by replacing steel plates inside of the tunnel. Other improvements will be made to the roadway in order to improve road safety and driver comfort. The project will also bring water quality benefits with the construction of a vegetated swale, which will filter pollutants from storm water and help replenish groundwater supplies.
During the project, Malibu Canyon Road will be closed from 9 pm – 5 am seven days a week, according to LA County Public Works. Signs have already been posted throughout the area to give drivers plenty of notice that roads will be closed.
Traffic will be detoured onto Kanan Dume Road and Topanga Canyon Blvd during these hours. All traffic will be allowed through at all other times. Emergency vehicles will be allowed access during construction.
For more information, visit the LA County Public Works website at http://dpw.lacounty.gov/pdd/proj/MalibuTunnel/