Day work will take place between the hours of 7 a.m. and 5 p.m. This includes pavement work along Huntington Avenue close to Artichoke Joes, preparation for signal system upgrades the following weekend, track work, excavation, potholing, drainage improvements at the temporary station, construction of retaining walls for the temporary station, and sanitary sewer and utility relocations. Relocation of sanitary sewers and utilities will primarily occur on Huntington and Angus 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 4 a.m., outside of peak passenger service hours. This work will include signal system upgrades, excavation, drainage improvements for the shoofly, construction of retaining walls for the temporary station, preparation for signal system improvements the following weekend, relocation and installation of traffic signals at San Mateo Avenue, as well as pedestrian and traffic gates on San Bruno and Angus avenues and at the San Mateo and Huntington avenues intersection. 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.

Additional night work will take place next weekend from Friday, July 22 to Monday, July 25. Crews will work during non-service hours, from 12:30 a.m. to 5 a.m. to avoid any interruptions to train operations. This includes the running of a test train from 10:30 p.m. Sunday, July 24 to 5 a.m. Monday, July 25, between the South San Francisco and Millbrae stations. The trains are used to evaluate the operational quality of the upgraded signal systems, and will sound warning horns as they approach crossings.

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.

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