There will be major ramp closures as all approaches to the Sunset Boulevard bridge that spans the 405 Freeway are reconstructed.
Drivers already have been dealing with delays this week.
In July, a 10-mile stretch of the 405 Freeway was shut down for the weekend and people feared massive gridlock. It never materialized.
Now officials are warning drivers in the construction zone to anticipate delays and plan ahead as they face closures and a lot of detours.