 MTS launched MTS Rapid service along the I-15 corridor June 8, 2014, launched San Diego State University and Downtown San Diego and launched Otay Mesa and Downtown San Diego in 2015.San Diego County has an extensive network of public roadways that allows vehicle drivers and bicyclists convenient direct access to all practical destinations in the county.Major freeways were built and repeatedly expanded to serve the needs of commuters coming into the city from the suburban regions of North County, South Bay, and East County, as well as the Tijuana metropolitan area.