SR-52 Operational Improvements Project

Caltrans, in partnership with SANDAG and the City of Santee, is in the pre-Environmental Phase of the SR-52 Operational Improvements Project, with an approximately 6-mile project area stretching from State Route 125 at the east end to the Santo Road on-ramp at the west end.

The Project began the Environmental Phase in Summer 2025 and is scheduled to finish in August of 2028. Design is scheduled to begin in fall, 2028, with advertisement taking place in Spring, 2031, and completion of construction in summer of 2034. It is currently funded through the Environmental and Design Phases with funds for the Construction Phase still being sought.

Current Scope

1. Convert the westbound #1 lane to a Managed Lane from Mast Boulevard to Santo Road (shown as #1 in the maps below).
2. Convert the existing two-way bike path on the north side of the freeway to a 4.7-mile-long westbound auxiliary/truck climbing lane from Mast Boulevard to Santo Road (shown as #2 in the maps below).
3. Relocate the bike path to the south side, including one 10-foot-wide light weight cantilevered separated bike path on two existing bridges (shown as #3 in the maps below).
4. Widen the westbound on-ramp from Mast Boulevard to SR 52 to a two-lane ramp (shown as #4 in the maps below).
5. Restripe westbound SR-52 from 2 lanes to 3 lanes from SR-125 to Mast Boulevard (shown as #5 in the maps below).
6. Restripe eastbound SR-52 from 2 lanes to 3 lanes from Mast Boulevard to east of the San Diego River Bridge, eliminating the lane drop at Mast Boulevard and maintaining three eastbound through lanes to SR-125 (shown as #6 in the maps below).

Communications Manager

Stephen Welborn
(619) 688-6670
Stephen.Welborn@dot.ca.gov

Caltrans
4050 Taylor Street
San Diego, CA 92110
(619) 688-6670