1. Home
  2. Caltrans Near Me
  3. District 12
  4. District 12 Programs
  5. District 12 Environmental
  6. SR-241/133 Multi Asset Project

SR-241/133 Multi Asset Project

Project Description

The California Department of Transportation (Caltrans) District 12 proposes a multi-asset improvement project to rehabilitate pavement, restore drainage systems, and enhance roadway safety and mobility along State Route 133 (SR-133) and State Route 241 (SR-241) in Orange County, California. The project improvements will extend from Post Mile (PM) 15.1 to PM 27.8 on SR-241 and PM 12.8 to PM 13.67 on SR-133 in the cities of Irvine, Lake Forest, Mission Viejo, Rancho Santa Margarita and Unincorporated County of Orange. Two alternatives are being considered: the Build Alternative and the No-Build Alternative.

Vicinity Map of the SR-241/133 Multi Asset Project

The Build Alternative includes pavement preservation through cold planing and replacement with open graded friction course and rubberized hot mix asphalt, drainage system restoration, lighting rehabilitation with LED upgrades, roadside rehabilitation, installation of rumble strips and curve warning signs, and complete street upgrades such as ADA-compliant curb ramps and pedestrian crosswalk restriping. The No-Build Alternative does not propose any major roadway rehabilitation and existing conditions would remain the same.

Caltrans is the Lead Agency for the National Environmental Policy Act (NEPA), with the environmental determination being a Categorical Exclusion (CE). The Department is also the Lead Agency for the California Environmental Quality Act (CEQA). An Initial Study (IS), leading to a Mitigated Negative Declaration (MND) is the CEQA Document and a Categorical Exclusion (CE) is the NEPA Document. 

Anticipated Project Schedule

  • Public Comment Period - May 20, 2026 - June 18, 2026
  • Final Environmental Document - June 23, 2026
  • Completion of Project Design - March 2028
  • Start of Construction - March 2029
  • Opening Year - Summer 2031

Draft Environmental Document 

The Draft IS was made available to the public and circulated to regional and local agencies to provide opportunity for their comments from May 20th to June 18th, 2026. The document was made available at the OC Library Foothill Ranch Branch (27002 Cabriole, Foothill Ranch, CA 92610), OC Library Rancho Santa Margarita Branch (30902 La Promesa, Rancho Santa Margarita, CA 92688), and at the California Department of Transportation - District 12 Office (1750 East 4th Street, Suite 100, Santa Ana, CA 92705), and also at the following URL: https://dot.ca.gov/caltrans-near-me/district-12/district-12-programs/district-12-environmental/sr-241-133-multi-asset-project.

 

Final Environmental Document

The final environmental document was approved June 23rd, 2026. Please refer to the files below for more details.

Documents 

Accessibility Assistance: Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of this document which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact the Caltrans District 12 Public Information Office at (657) 328-6000 or visit https://dot.ca.gov/request-ada-compliant-documents.

Final Environmental Document

Contacts

Project Email: SR.241.133.Multi.Asset@dot.ca.gov