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 January 2026)
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
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Closures and Detours
Lane And Sidewalk Closures Along Olive And West Avenues In Fresno
Multiple Closures: Lane and sidewalk closure along Olive Avenue, east of West Avenue; Lane closures along West Avenue, north and south of Olive Avenue. Work is scheduled from 9 a.m. to 4 p.m. and will continue through Friday, April 3, 2026. Download Map of...
Lane Closures Along Frontage Road in Madera County
Lane closures along Frontage Road, between Club and Wayside Drive in Madera County for ongoing construction of a high-speed rail grade separation. Work is scheduled to start Monday, March 23 through Friday, April 24, 2026. Download Map of Closure/Detour...
Lane Closures Along Cedar And Central Avenues In Fresno
Lane closures at the intersection of Cedar and Central avenues in Fresno for utility work. Work is scheduled from 9 a.m. to 4 p.m. starting Monday, March 23 through Friday, April 17, 2026. Download Map of Closure/Detour (PDF)Signage and flaggers will be in place to...
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 26 to Friday, May 3, 2026. Download Map of...
Hauling Along State Route 43 And Excelsior Avenue In Fresno And Kings Counties
Intermittent traffic impacts along SR 43 between Davis and Excelsior avenues in Fresno and Kings Counties to transport materials to a high-speed rail construction site. Work is scheduled to begin Monday, March 23 through Wednesday, March 25, 2026. Download Map of...