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 13.67on 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.
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.
A Draft IS with MND has been prepared for this project, which documents potential environmental impacts and proposed avoidance, minimization and/or mitigation of potential impacts associated with the proposed Build Alternative.
Anticipated Project Schedule
- Public Comment Period - May 20, 2026 - June 18, 2026
- Project Approval & Environmental Document - June 30, 2026
- Completion of Project Design - March 2028
- Start of Construction - March 2029
- Opening Year - Summer 2031
Draft Environmental Document
Caltrans will publicly circulated the Draft Environmental Document - Initial Study to the public for 30 days between May 20, 2026 and June 18, 2026.
Hardcopies of this document are available for review at the Caltrans District 12 office at 1750 East 4th Street, Suite 100, Santa Ana, California 92705 and at the following libraries:
- OC Library – Foothill Ranch Branch (27002 Cabriole, Foothill Ranch, CA 92610) (Hours: Mon - Thu: 10:00 am - 7:00 pm and Sat: 9:00 am - 5:00 pm)
- OC Library – Rancho Santa Margarita Branch (30902 La Promesa, Rancho Santa Margarita, CA 92688) (Hours: Mon - Thu: 10:00 am - 7:00 pm and Fri - Sat: 9:00 am - 5:00 pm)
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.
Draft Environmental Document
Contacts
Project Email: SR.241.133.Multi.Asset@dot.ca.gov