Site work and paving for a road / highway in Paso Robles, California. Conceptual plans call for site work for a road / highway; and for paving for a road / highway.

The City and the surrounding San Luis Obispo County area have begun to experience substantial commercial and industrial development in the southern portion of the City adjacent to the US Highway 101 and State Route 46 West interchange. The resulting growth in local traffic, combined with the increasing regional through traffic, has resulted in increasing congestion. The need for this interchange improvement project was identified in 1997 by Caltrans, the County, SLOCOG, and the City. The overall project will be constructed in three phases. Phase I, completed several years ago, included reconstruction of the US 101/State Route 46 West interchange ramps, and the relocation of Theatre Drive to a new intersection with State Route 46 West. Phase II, currently under way, realigns the South Vine Street and constructs a bridge to intersect with this new intersection, away from the interchange ramps. The final phase, this project, includes an interchange reconstruction that would convert the existing compact diamond (Type L-1), signal-controlled ramp intersections into roundabouts. In 2023, the City finalized the project approval and environmental documents, fully funded from a SLOCOG grant. The next step of the project is to finalize project specifications and estimates. Construction costs and funding are unknown and as such, only preliminary estimates are shown below As of August 3, 2024, this project is included in the city's 2024-2029 Capital Improvement Program (CIP) *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.