BuildHSR: High-Speed Rail Projects
High-Speed Rail Completes Underpass Reconnecting Downtown and Southwest Fresno
The California High-Speed Rail Authority (Authority) announced on March 13, 2026, the completion of the Cesar Chavez Boulevard underpass grade separation project. Located less than a mile from the future Fresno Station site, the underpass now connects downtown to southwest Fresno and Chinatown safely while reducing greenhouse gas emissions in a historically disadvantaged and polluted area.
The Cesar Chavez Boulevard underpass, located between F and H streets, is designed for two-lane traffic, bike lanes, and protected walkways in both directions. The grade separation spans more than 1,000 feet long and 90 feet wide and will take traffic more than 15 feet below the Union Pacific Railroad and future high-speed rail tracks.
In Fresno County, grade separations, such as the Cesar Chavez Boulevard underpass, are estimated to reduce accidents, fatalities, injuries, and property damage, resulting in a total public benefit of approximately $3.3 billion over 30 years.
Construction by the Numbers (As of December 2025)
Construction Progress
Structures Completed
Miles of Guideway Completed
Structures Underway
Miles of Guideway Underway
Structures to begin
Miles of Guideway to begin
Construction Update
Winter Progress Report
See major construction updates on high-speed rail structures throughout the Central Valley, including the Road 26 Grade Separation, Hanford Viaduct, and Shaw Avenue Grade Separation. The video also features updates on the railhead project in Kern County, the track and systems contract, and the release of the draft environmental impact document for the Los Angeles to Anaheim segment.
Construction by the Numbers (As of November 2025)
Small Business Revenue
Construction Package 1
Construction Package 2-3
Construction Package 4
Construction Update
Spring 2025
Read all about the progress being made on the 119-miles of construction in the Central Valley. This includes updates to some of the largest projects including the Conejo and Hanford Viaducts.
Construction by the Numbers (As of November 2025)
Number of Small Businesses
Construction Package 1
Construction Package 2-3
Construction Package 4
Click Below for More Information
Closures and Detours
Multiple Closures Along Golden State Boulevard and Jensen Avenue in Fresno
MULTIPLE CLOSURES: Intermittent lane closures along Golden State Boulevard between East to Orange avenues; Intermittent lane closures along Jensen Avenue at Golden State Boulevard. Work is scheduled from 9 p.m. to 6 a.m. starting Sunday, March 15 through Friday, May...
Hauling Along State Route 43 In Fresno County
Intermittent traffic impacts along SR 43 between Davis Avenue and Cole Slough in Fresno County to transport materials to a high-speed rail construction site. Work is scheduled from 6 a.m. to 6 p.m. on Thursday, March 19 and Friday, March 20, 2026. Download Map of...
Hauling Along State Route 43 And Iona Avenue In Kings County
Intermittent traffic impacts along SR 43 and Iona Avenue in Kings County as crews transport materials to a high-speed rail construction site. Hauling is scheduled from 6 a.m. to 6 p.m. starting Sunday, March 15, through Thursday, April 30, 2026. Download Map of...
Lane Closure Along Santa Ana And Cornelia Avenues In Fresno
Multiple Lane Closures: Lane closure along southbound Cornelia Avenue, between Shaw and Santa Ana avenues; Lane closure along eastbound Santa Ana Avenue, between Cornelia Avenue and Golden State Boulevard. Work is scheduled from 9 a.m. to 4 p.m. and will continue...
Intermittent Lane Closures Along G And H Streets In Fresno
MULTIPLE CLOSURES: Intermittent lane closures along G Street, between Tuolumne and Mariposa streets; Intermittent lane closures along H Street, north of Mariposa Street. Work will continue through Friday, March 27, 2026. Download Map of Closure/Detour (PDF)Signage...