WEST LOS ANGELES (CBSLA.com) — The northbound I-405 off-ramp to Sunset Boulevard will be shut down for 120 days starting Friday night.

The closure, which is scheduled to begin at 7 p.m., is a part of the I-405 Sepulveda Pass Improvements Project.

“As soon as the off-ramp is closed the contractor is going to do striping work and they are going to begin to prepare for demolition work which begins tonight,” Metro’s Director of Communications Dave Sotero said.

The demolition will take about a week before the contractor begins building a new off-ramp.

“The new ramp is going to be a thousand feet longer, and it’s going to carry 60 percent more passengers on the ramp itself. So it’s going to help improve traffic flows getting off the 405 and heading to the UCLA/Westwood area,” Sotero said.

The new configuration will feature two northbound right-turn lanes to eastbound Sunset Blvd. and one northbound left-turn lane to westbound Sunset Blvd.

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“In the past we’ve been able to open up these extended closures early,” Metro’s Director of Communications Dave Sotero told KNX1070. “We’re not making any promises at this point, but it remains a possibility.”