Nighttime work on I-280 between Alpine Road and Sand Hill Road from October 6-11

San Mateo County ― Caltrans will be performing overnight work to restore the eroded Los Trancos Creek banks below the bridge on I-280 near Alpine Road starting on Monday, October 6. The three right lanes in both the northbound and southbound directions of I-280 will be closed near Alpine Road between 8:00 p.m. and 6:00 a.m. starting on Monday night, October 6, and ending on Saturday morning, October 11. In addition, the on- and off-ramps at Alpine Road will be closed.

Closures are between 8:00 p.m. and 6:00 a.m. nightly

• Northbound I-280: Three right lanes will be closed from Page Mill Road to Alpine Road.
• Southbound I-280: Three right lanes will be closed from Sand Hill Road to Alpine Road.
• Northbound I-280: The off-ramp to Alpine Road will be closed. Continue to Sand Hill Road, exit, and take the on-ramp for southbound I-280 and exit at Alpine Road.
• Alpine Road on-ramp to southbound I-280 will be closed. Continue on Alpine Road south to Arastradero Road, turn left on Arastradero Road, and then left on Page Mill Road to access southbound I-280.

Please follow detour signs.

All work is weather dependent. Please drive with caution. Thank you for your patience as we work to maintain our state's highways, bridges, and tunnels.

For real-time traffic, click on Caltrans QuickMap: https://http://quickmap.dot.ca.gov/