405 Freeway Update

The Orange County Transportation Authority, in cooperation with Caltrans, is widening the San Diego Freeway (I-405) between SR-73 and I-605.The project is improving 16 miles of I-405 between the SR-73 freeway in Costa Mesa and I-605 near the Los Angeles County line. Construction updates are as follows: Bolsa Avenue Full Closure

Crews will continue concrete work for a retaining wall along eastbound Bolsa Avenue. This work requires full closures of Bolsa between Goldenwest Street and Chestnut Street.

Nightly closures are set to begin as early as Jan. 19, from 9 p.m.-5 a.m., on weeknights, for approximately two weeks.

Additionally, crews will pour concrete for the Bolsa bridge over the I-405. This work will require a full 12-hour closure of Bolsa between Goldenwest Street and Chestnut Street.

The closure is set to start this week.

A detour will be in place for pedestrians and bicyclists to navigate around the closure.

Westminster Boulevard Traffic Shift

Crews will shift traffic to the new Westminster bridge over I-405. The shift will occur in three phases and will require lane reductions.

Eastbound Westminster was reduced to one lane between Springdale Street and Willow Lane, and eastbound traffic was shifted onto the new bridge Jan. 12.

Crews constructed the center median on weekdays and Saturdays, with work tentatively scheduled for completion on Tuesday.

Westminster was scheduled to be reduced to one lane in each direction between Springdale Street and Willow Lane Tuesday, with westbound traffic shifted onto the new bridge.

Fairview Road Traffic Shift

Crews also will soon shift traffic to the new half of the Fairview bridge over I-405 and begin working on the second half of that bridge. The traffic shift is set for early-to-mid February and will require bridge and ramp closures.