Grade Separation Update: Traffic to Be Limited on San Bruno Avenue

Work on the San Bruno Grade Separation Project will take place Saturday, Nov. 5 to Friday, Nov. 11. 

This weekend from Friday, Nov. 4 to Sunday, Nov. 6, crews will limit traffic on San Bruno Avenue to one lane. From 7 p.m. on Friday until Sunday morning, traffic cones and flaggers will direct vehicles going in both directions through the westbound lane of San Bruno Avenue. During this time, crews will work around the clock to excavate and then repave the area around the tracks in preparation for the eventual shoofly. 

Day work will take place between the hours of 7 a.m. and 5 p.m. This work will include removing and installing traffic signs, signal system upgrades, installing and removing fences along the right-of-way, grading for the shoofly, installing drainage for the shoofly, asphalt and concrete work at the San Bruno and San Mateo avenues intersection, roadway striping, track work, and water line and sanitary sewer relocations. Motorists should expect delays. Relocation of water lines and sanitary sewers will primarily occur along Angus and Huntington avenues and may require temporary lane closures. Traffic cones and flaggers will direct motorists and pedestrians around the affected areas. 

Night work will take place from 8 p.m. to 7 a.m., outside of peak passenger service hours. This work will include signal system upgrades, grading for the shoofly, relocating communication utilities, installing drainage for the shoofly, relocating pedestrian and traffic gates at San Bruno Avenue, removing and installing traffic signs, and demolishing the former station. Demolishing the former station must occur at night so as not to disrupt train service and also to protect the safety of construction workers given the close proximity to tracks. Digging work will require the use of a backhoe, mini-excavator and jackhammer. At times, noise levels could be as high as 75 decibels. Crews will use generators to power portable light towers. Night work will be done in accordance with Caltrain and city agreements and ordinances.

The $147 million project will elevate the Caltrain tracks above three existing at-grade street crossings at San Bruno, San Mateo and Angus avenues. A new elevated Caltrain station will be constructed between San Bruno and San Mateo avenues, replacing the existing station at Sylvan Avenue.

—Caltrain