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
Click Below for More Information
Closures and Detours
Hauling Along Nevada Avenue, Avenue 5 1/2 And Niles Avenue In Tulare County
Intermittent traffic impacts along Nevada Avenue, Avenue 5 1/2, and Niles Avenue in Tulare County to transport materials to a high-speed rail construction site. Work is scheduled to being Monday, March 30 through Wednesday, April 01, 2026. Download Map of...
Lane Closures Along G Street in Fresno
Lane closures along G Street, between Ventura Street / Cesar Chavez Boulevard and Inyo Street in Fresno for road improvements. Work is scheduled to begin Monday, March 30 and will continue through Friday, April 10, 2026. Download Map of Closure/Detour (PDF)MONO STREET...
Road And Sidewalk Closures Along Divisadero Street In Fresno
Road and sidewalk closures along Divisadero Street between G Street and Roosevelt Avenue in Fresno for utility work. Work is scheduled from 9 p.m. to 6 a.m. on Monday, March 30, 2026. Download Map of Closure/Detour (PDF)EASTBOUND DIVISADERO STREET DETOUR: Traffic...
Closures Along State Route 99 To Golden State Boulevard On- And Off-Ramps In Fresno
Closures of the SR 99 to Golden State Boulevard on- and off-ramps in Fresno for road work. Work is schedule to begin Tuesday, April 7 through Thursday, April 9, 2026. Download Map of Closure/Detour (PDF)NORTHBOUND GOLDEN STATE BOULEVARD DETOUR: Traffic going...
Lane Closures At State Route 43 And Avenue 88 In Tulare County
Intermittent traffic impacts along SR 43, south of Avenue 88 in Tulare County for road work. Work is scheduled from 6 a.m. to 6 p.m. starting Wednesday, April 1 through Friday, April 3, 2026. Download Map of Closure/Detour (PDF)Signage and flaggers will be in place to...