South Bay Expressway
The South Bay Expressway (SBX) toll road (the SBX Project) is a 9.2-mile, privately-developed southern extension of SR 125, extending from San Miguel Road in Bonita, CA near the Sweetwater Reservoir to SR 905 in Otay Mesa, near the International Border. The SBX Project connects the only commercial port of entry in San Diego to the regional freeway network. This project, made possible through an innovative public-private partnership (P3), completes the missing link in San Diego's third north-south freeway corridor.
The SBX Project was developed pursuant to California's AB 680 legislation passed in 1989. Under the original franchise agreement, the private developer raised capital for the Project and constructed the road in exchange for a 35-year toll concession. Caltrans owns the highway, but leases the road back to the franchisee. Currently, SANDAG has the franchise, under an amended agreement executed when the toll road was sold to SANDAG in December 2011. Control will revert back to Caltrans in 2042.
The SBX Project connects Otay Mesa, the largest area of industrial-zoned land in San Diego County, with eastern Chula Vista and points north and east. The increased access between industrial, commercial, and residential areas has created value for manufacturing companies and its employees by reducing shipping time to local markets and by providing a less congested and more direct commuter option The SBX Project also utilizes an optional electronic tolling system, FasTrak, giving drivers the option to avoid stoppages at toll booths and to maintain steady driving speeds. Additionally, low tolls draw traffic to SBX, thereby relieving congestion on I-805 and nearby surface streets.