Gustine Roundabout

Project Description

Construct a single lane roundabout at the intersection of 4th Street and 6th Avenue, and realign Railroad Avenue, in the City of Gustine.

The construction of a single-lane roundabout at the intersection of 4th Street and 6th Avenue will accommodate a vehicle design speed of approximately 25 miles per hour and will accommodate Surface Transportation Assistance Act (STAA) sized truck movements. In addition, construction of the roundabout and the realignment of South Avenue and Railroad Avenue will eliminate 4 stop signs: 2 on State Route 33/140 and 2 at Railroad Avenue. Elimination of the stop signs improves traffic flow through this area.


Project Benefits

Purpose and Need

The purpose of this project is to improve traffic movements and traffic flow through the 4th Street and 6th Avenue intersection on State Route 33/140 by constructing a roundabout and realigning Railroad Avenue to intersect with the 4th Street and 6th Avenue intersection. These improvements will improve intersection operations, reduce congestion, and enhance safety at this location.

The proposed project will focus on emissions reduction and air quality improvements. At the 4th Street and 6th Avenue intersection motorists often experience confusion navigating their way through this intersection.


Funding Source

Congestion Mitigation and Air Quality (CMAQ) grant from Merced County Association of Governments (MCAG). Total project cost is estimated at $2.7 million.


Project Cost/Programmed (x$1,000):

Programed Project Cost Capital $ Support $
Project Approval & Environmental Document $0 $0
Plans, Specifications, & Estimates $0 $0
Right of Way $0 $0
Construction $0 $0


Projected Cost as of March 20, 2024 Planned $ Expended $
Project Approval & Environmental Document $0 $279
Plans, Specifications, & Estimates $0 $371
Right of Way $0 $2
Construction $0 $0


Current Schedule

Process Date
Project Approval & Environmental Document (M200) Winter 2021
Right of Way Certification (M410) Winter 2021
Ready to List (M460) Winter 2021
Approved Construction Contract (M500) Spring 2024
Project Completion (M600) Fall 2024


Project Status

This project was awarded in February 2024 and is pending approved construction contract.


Project Contact

Caltrans District 10 - Program Project Management
Mimi Huie, Project Manager
Phone: (209) 607-3170

Caltrans District 10 - Public Information Office
Phone: (209) 948-7977
Address: P.O. Box 2048, Stockton, CA 95201-2048


Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.