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Mission Bay Development Project San Francisco, CA

This 302-acre urban infill development project is located in a previous rail yard site with over 10 million gross square feet of R&D, university, hospital, residential, office, retail, and hotel development. This development is fully integrated with the Muni Third Street Light Rail line service and several freeway ramp interchange improvements.

As traffic engineer, CHS Consulting Group’s responsibilities include signal design, signing and pavement delineation design, and preparation of traffic control plans. CHS designed or modified a total of 22 signals and prepared signing and pavement delineation for 32 city blocks. The 22 traffic signals include those along the LRT line on 3rd and 4th Streets, which require a signal priority system for the light rail trains. There is also an at-grade Caltrain rail transit crossing at the intersection of 7th and 16th Streets. In addition, there are 3 I-280 Caltrans signals: one at the I-280 on- and off-ramps at King and 5th Streets, and 2 at the I-280 on-ramps and off-ramps at Mariposa Street.

CHS had to coordinate the design of signals, intersection geometries, and the LRT signal priority system with several city agencies, such as the San Francisco Municipal Transit Agency and the San Francisco Department of Parking and Traffic (DPT), and state & regional agencies such as Caltrans, the Peninsula Corridor Joint Powers Board, and Union Pacific Railroad.

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