Heading out for a late-night drive this week? You might want to take surface streets if you plan on heading to Orange County. Caltrans engineers will close both directions of the Santa Ana (5) Freeway between the San Gabriel River (605) Freeway and Norwalk Boulevard starting tonight at 11 p.m., while on-ramps from the 605 will shut down at 9 p.m.
The closures here will continue on Wednesday and Thursday night those same hours. Caltrans officials expect lanes to open by 5 a.m., and said they recommend detouring through the 605 and the Artesia (91) freeways.
These closures will allow the roadway to be widened and rebuilt between the 605 and the Orange County border, a $1.9 billion series of projects that will revamp a freeway built in the early 1950s.
It’s not the only major closure starting tonight.
The transition ramp from the northbound San Diego (405) Freeway to the westbound Glenn Anderson (105) Freeway will close tonight at 10 p.m. for reconstruction and remain out of service for the next four months.
Crews will be demolishing and removing the concrete surface, after which the roadway and embankment will be rebuilt, along with a new drainage system.
As a detour, motorists are advised to exit the northbound 405 at either Imperial Highway or Century Boulevard and turn left toward Los Angeles International Airport. Motorists traveling from farther south should consider taking the Harbor (110) Freeway north to the 105 as an alternative.
The ramp from the northbound 405 to the eastbound 105 has been closed for about 14 weeks for reconstruction, but that transition road will reopen at 5 a.m. Wednesday.