South Madera 6-Lane

Project Description

The California Department of Transportation (Caltrans) proposes to widen State Route 99 in Madera County from just north of Avenue 7 to Avenue 12 (post miles 0.1-8.1). One lane would be built in each direction on the highway median to create a six-lane highway. Additionally, the existing lanes and shoulders of State Route 99 would be rehabilitated, and a concrete median barrier would be installed along with an auxiliary lane at the Avenue 12 northbound off-ramp.


Graphic depicting the project location in Madera


Project Benefits


The purpose of the project is to reduce congestion by increasing capacity, improving connectivity of the highway system, and preserving acceptable facility operation.


The State Route 99 highway within the project limits currently operates at acceptable levels of service during peak traffic hours and will continue to do so through the year 2026 without any improvements. However, by the year 2046, the highway mainline will have insufficient capacity to accommodate the forecasted traffic demand under the No-Build Alternative, and delays would significantly increase.

The existing (2019) level of service for the northbound and southbound lanes is Level of Service D. In the year 2026, the levels of service would be D to E for both the northbound and southbound lanes. Twenty years later, in the year 2046, the level of service would deteriorate to a level of service F for both the northbound and southbound lanes if the highway is still only two lanes in each direction.

The existing annual average daily traffic within the project limits is about 80,500.

In the year 2026, the annual average daily traffic is forecast to be 90,500. In the year 2046, the annual average daily traffic is forecast to be 127,000.


Estimated Funding Breakdown

Construction Cost: $126,860,000



  • County of Madera
  • Madera County Transportation Commission


Proposed Project Schedule

Process Date
Environmental document to be completed May 2021
Right-of-way acquisition to be completed July 2023
Design to be completed August 2023
Advertise November 2023
Construction to begin July 2024
Construction to be completed October 2026


Project Contact Info

District 6 Public Information Office
Phone: (559) 444-2518




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 FTA Website - 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.