Servicing the North County inland areas of San Diego County, SR 76 is an east-west highway starting at I-5 on the west and linking to I-15 on the east. It traverses the City of Oceanside, and the unincorporated communities of Bonsall, Fallbrook, Pala, Pauma Valley, Rincon and Lake Henshaw. 

This project was constructed in three segments: the West, Middle, and East.

The West Segment, located between I-5 and Melrose Drive, was completed in 1999. 

The Middle Segment, located between Melrose Drive and South Mission Road, was completed at the end of 2012. 

The East Segment was constructed in two phases. Phase 1 construction on the SR 76/I-15 interchange began in October 2012 and was completed in summer 2013. Phase 2 construction to widen and realign the roadway began in November 2014 and was completed in May 2017.