I-5/SR 78 Interchange Project
In the past few years, SANDAG and Caltrans have worked with stakeholders to complete a preliminary screening of project alternatives for the interchange. Improvements could include direct freeway-to-freeway connectors from southbound I-5 to eastbound SR 78 and westbound SR 78 to southbound I-5, direct access ramps to managed lanes, and transit vehicle linkage.
Caltrans also is investigating the feasibility of interim operational improvements to improve the flow of traffic entering I-5 from SR 78.
Improvements to the I-5/SR 78 interchange are part of the SANDAG 2050 Regional Transportation Plan and are currently slated to begin construction between 2035-2040 pending funding availability. More information is available on the project page.
SR 78 Express Lanes Project
SANDAG and Caltrans have evaluated a proposal to construct two Express Lanes, one in each direction, on SR 78 between I-5 and I-15. Other major improvements include bridge replacement/widening, ramp relocations, and street realignment operational improvements. The goal of the project is to improve the overall movement of people and goods between I-5 and I-15 on SR-78 by implementing the most cost effective strategies while minimizing impacts to the surrounding communities. Environmental, Design, and Construction are currently unfunded.