Caltrain construction and maintenance

California's Caltrain will be undergoing construction and maintenance January 29-February 4. San Bruno Grade Separation Project: Work on the San Bruno Grade Separation Project will take place Monday, Jan. 31 through Friday, Feb 4. This work includes continuation of the storm pipe installation near the intersection of San Bruno and Huntington avenues; communication cable installation near Walnut Street and another near the Scott Street crossing, drainage improvements near the I-380 overpass; upgrading signal systems and preparation work for the construction of the future temporary station. Night work will include installing temporary signal structures and new signal houses near the Scott Street crossing and construction of the retaining wall for the temporary station. Any required digging work will require the use of a backhoe, mini-excavator and jackhammer and noise levels could potentially reach 75 decibels at times. Crews will use generators to power portable light towers. 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. Santa Clara Station Improvement Project: Work on the new pedestrian underpass at the Santa Clara station will be from Saturday, Jan. 29 to Friday, Feb. 4. The underpass will connect the north- and southbound platforms, allowing two trains to pass through the station at the same time and improving safety for pedestrians in the station. The work is part of an 18-month station improvement project that will add a new wider, longer center-boarding platform and extend the southern platform 150 feet. San Mateo Bridges Rehabilitation Project: Caltrain will begin retrofitting four rail bridges in San Mateo on Monday, Jan. 31. The project involves seismic improvements to the bridges that cross Poplar, Santa Inez, Monte Diablo and Tilton avenues. Construction activities include excavating around current bridge foundations, installing new foundations and building new abutments to enhance the strength of the bridges. Jerrold Avenue Bridge Replacement Project: Crews will continue building the piles for the foundation of the new Jerrold Avenue Bridge in San Francisco. Work will be done from Monday, Jan. 31 to Friday, Feb. 4, from 8 p.m. to 4:30 a.m. Construction activities include excavation, removing bridge overhangs and moving earth. Santa Clara County Grade Crossing Improvements: Construction on a VTA project that will improve safety at eight grade crossings in Sunnyvale, Mountain View and Palo Alto continues. Maintenance: Caltrain will perform routine maintenance at several locations. San Francisco to Milbrae, Sunday, Jan. 30 to Thursday, Feb. 3, crews will resurface tracks and replace crossties between the Bayshore and Millbrae stations. Palo Alto to Santa Clara, Monday, Jan. 31 to Thursday, Feb. 3, crews will weld and resurface tracks between California Avenue and Santa Clara stations. San Jose, Sunday, Jan. 30, crews will weld on the tracks north of the San Jose Diridon station.