Updated: Dec. 17, 2025
Bridge upgrades on U.S. 101 at Alvarado Street, Santa Monica Boulevard and First Street began Dec. 8
LOS ANGELES – Ongoing lane modifications to two bridges on U.S. 101 to prepare for completing bridge rail upgrade work began Dec. 8. Modifications to a third bridge on U.S. 101 and one on State Route 110/Arroyo Seco Parkway (SR-110) will begin in early 2026.
This work was previously scheduled to start in October.
The below modifications are in effect and will remain until the project is completed:
U.S. 101 at Santa Monica Boulevard
- Northbound reduced up to three lanes at the Santa Monica Boulevard overcrossing
- Southbound reduced up to two lanes at Santa Monica Boulevard overcrossing
U.S. 101 at Alvarado Street
- Northbound and southbound bus lane reduced to one lane
The below modifications will go into effect in early 2026 (notices will be sent in advance). Once in place, these will remain until the project is completed:
SR-110/Arroyo Seco Parkway at Avenue 60
- Northbound: The Avenue 60 off-ramp will be closed
U.S. 101 at First Street
- Northbound and southbound: Three lanes will remain open in each direction, but the width of each lane will be reduced from just north of the First Street off-ramp to just north of the Fourth Street on-ramp.
The posted speed limit will be reduced by 10 mph in each of the four construction zones.
Generally, working hours will be between 9 p.m. to 5 a.m. weekdays. During these times, intermittent on- and off-ramp closures may take place. Specific schedules will be shared in advance and signs alerting motorists will be posted.
Closures and lane reductions are subject to change due to weather or operational reasons. Motorists are advised to plan ahead, use caution near construction zones and expect potential delays. For real-time updates and additional information, please visit the Caltrans Quickmap.
This work is part of a $15.8 million project to upgrade existing bridge rails to current standards and increase the durability and longevity of the three bridges on U.S. 101 and another on SR-110 at Avenue 60.
Work on the bridge at Avenue 60 will begin in early 2026. Long-term closures of the on-ramp will be required at this location. Caltrans will give at least two weeks' notice for the long-term ramp closure.
Crews will also update signage, streetlights and traffic signals at bridge locations. The Santa Monica and Alvarado Street bridges will include updated sidewalks and ADA facilities.
The project is anticipated to be completed at the end of 2027.
Caltrans reminds motorists to "Be Work Zone Alert" and "Slow for the Cone Zone."
