It's time to practice for the big one.
Er, the big … freeway shut down. Again.
Portions of the nation's busiest insterstate – the San Diego (405) Freeway – will close through the Westside of Los Angeles for 10 hours starting Saturday night.
The southbound freeway closure is needed in preparation for the epic shutdown of both sides of the freeway – dubbed "Carmageddon 2," after last summer's much-hyped closure.
That 53-hour sequel is slated for 7 p.m. Sept. 28 to 5 a.m. Oct. 1. It will close 10 miles of the 405 from the Santa Monica (10) Freeway to the Ventura (101) Freeway.
This weekend's prequel to the sequel – or is this Carmageddon 1.5? – will begin 11 p.m. Saturday and last through 9 a.m. Sunday.
The southbound 405 will be shut down from the 101 to Getty Center Drive. Freeway ramps connecting both directions of the 101 to the southbound 405 will also be closed.
Next weekend will see the closure of the northbound 405 from Getty Center Drive to Ventura Boulevard, with 101 connectors also being closed.
The northbound closure is slated for 11 p.m. Saturday, Sept. 15 to 9 a.m. Sunday, Sept. 16.
The work is needed to prepare the final half of the Mulholland Bridge for demolition, according to the Metropolitan Transportation Authority, which is overseeing the massive I-405 Sepulveda Pass Improvements Project.
The project will add a carpool lane to one of the most congested stretches of freeway in the country.