California Department of Transportation

State Route 46:
Corridor System Management Plan

The SR 46 CSMP assesses current performance, identifes causal factors for congestion, and based on testing of alternative improvement scenarios proposes the best mix of project improvements. This includes strategies and actions to restore throughput, improve travel times, increase reliability and safety, and preserve the corridor. The Corridor is not limited to project boundaries and includes all transportation components (not just highways) that affect mobility on a major travel path. The CSMP limits includes State Route 46 (both 46 East and 46 West) in its entirety within Caltrans District 5 (San Luis Obispo County).

A preliminary look at the corridor identified two areas of special focus: the interchange of US 101 and SR 46 West (just south of Paso Robles) and the five mile segment of SR 46 East stretching from the US 101 interchange to Jardine Road. All transportation planning partners worked together to find solutions to multiple problems on both. A study team met regularly to discuss improvement strategies for the five-mile segment of SR 46 East as a part of the Route 46 Comprehensive Corridor Study (CCS). The CCS defined a sustainable transportation strategy and long-term vision for this high-use segment of SR 46. The SR 46 CSMP included all pertinent studies, analyses and improvement scenarios, with multiple opportunities for public input. The final SR 46 CSMP was adopted June 2009.


Hana Megsteab (Acting Branch Chief)
(805) 549-3130

Last updated: February 22, 2017