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 Sidewalk Closures Along G And H Streets In Fresno
Multiple Closures: Sidewalk closures along G Street, between Merced and Mariposa streets; Sidewalk closure along H Street, north of Broadway Plaza. Work is scheduled to continue through Friday, March 27, 2026. Download Map of Closure/Detour (PDF)H ST PEDESTRIAN...
Road Closure Along Mono Street in Fresno
Permanent road closure Mono Street, between G and H streets in Fresno. Cesar Chavez Boulevard is now open to traffic. Closure will go into effect on Tuesday, March 10, 2026. Download Map of Closure/Detour (PDF)Mono Street Eastbound Detour: Eastbound traffic along on...
Lane Closures Along Belmont Avenue In Fresno
Lane closure along Belmont Avenue at Safford Avenue in Fresno for roadway work. Work is scheduled from 9 a.m. to 4 p.m. on Tuesday, March 10 and Wednesday, March 11, 2026. Download Map of Closure/Detour (PDF)Signage will be in place to direct traffic. Access to all...
Road Closures Along Herndon Avenue And Golden State Boulevard In Fresno
Multiple Roadway And Off Ramp Closures: Road closure along Herndon Avenue, between Riverside Drive and State Route (SR) 99; Road closure along Golden State Boulevard between Kathryn Avenue and Veterans Boulevard. Work is scheduled to begin at 9 p.m. starting Friday,...
Hauling Along State Route 43 In Kings County (Kent and Lansing)
Intermittent traffic impacts along State Route (SR) 43 between Kent Avenue and Lansing Avenue in Kings County to transport materials to a high-speed rail construction site. Work is scheduled Work is scheduled to begin Tuesday, March 10, 2026 through Monday, March 16,...