BuildHSR: High-Speed Rail Projects
High-Speed Rail Completes Two More Structures
The California High-Speed Rail Authority (Authority) announced in the week of October 27, 2025, the completion of two more structures within the 119-miles of construction underway in the Central Valley. On October 30, 2025, the Authority announced the completion of the Avenue 17 Grade Separation project in Madera County. The next day, the Authority announced the completion of the Hanford Armona Road grade separation in Kings County. The completion of these two projects brings the total number of completed structures to nearly 60.
Avenue 17 was once a cul-de-sac ending at the BNSF railroad tracks. The grade separation will now serve as a new through roadway, improving east-west mobility for the surrounding community while reducing emergency response times for the area. Located between Lake Street and Raymond Road, the Avenue 17 grade separation spans 614 feet long and is more than 43 feet wide. The grade separation also includes a pedestrian walkway, taking vehicular traffic and pedestrians over the BNSF and future high-speed rail tracks.
The Hanford Armona Road grade separation is located east of the city of Hanford between State Route 43 and 7th Avenue. The structure spans 209 feet, 80 feet wide, and will take east and westbound vehicular traffic over the future high-speed rail tracks. It is also located less than a mile south of the Hanford Viaduct, high-speed rail’s largest active construction project.
Avenue 17 in Madera County
Hanford Armona Road in Kings County
Construction by the Numbers (As of July 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
State Route 43 Tied Arch Bridge
The construction team recently completed the installation of all 44 hanger guide pipes, which are designed to house the tension rods that help support the structure. Falsework has also been erected to help ironworkers tie rebar for the future arches that will span over State Route 43. When complete, the Tied Arch Bridge will span 249 feet long and will take high-speed trains over State Route 43! #BuildCA #BuildHSR #InfrastructureWeek
Construction by the Numbers (As of August 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 August 2025)
Number of Small Businesses
Construction Package 1
Construction Package 2-3
Construction Package 4
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Closures and Detours
Road Closures At Poplar Avenue/Avenue 144 In Tulare County
Road closure along Poplar Avenue/Avenue 144 between State Route (SR) 43 and Fourth Avenue in Tulare County for ongoing work at the Tule River Viaduct. Work is scheduled from 7 a.m. to 5 p.m., beginning Monday Dec. 1 through Tuesday Dec. 2, 2025. Download Map of...
Multiple Closures Along Herndon Avenue And State Route 99 Off-Ramp In Fresno
Multiple Lane Closures: Intermittent lane closures along Herndon Avenue, between the northbound SR 99 to Herndon Avenue off-ramp and Riverside Drive; Intermittent lane closures on the northbound SR 99 to Herndon Avenue off-ramp. Work is scheduled from 11 p.m. to 6...
Intermittent Traffic Impacts Along State Route 43 in Fresno County (Tied Arch)
Intermittent traffic impacts along SR 43, between Davis Avenue and a private access road south of Cole Slough in Fresno County for ongoing work on a high-speed rail structure. Work is scheduled intermittently from 6 a.m. to 6 p.m. starting Monday, Dec. 1, 2025,...
Hauling Along Davis, Fowler, Manning, Clovis, South, Cedar And Lincoln Avenues In Fresno County
Intermittent traffic impacts along Davis, Fowler, Manning, Clovis, South, Cedar and Lincoln avenues in Fresno County to transport materials to a high-speed rail construction site. Hauling is scheduled intermittently between 6 a.m. and 6 p.m. starting Monday, Dec. 1...
Traffic Impacts Along State Route 43, Denver And Ninth Avenues In Fresno And Kings Counties
Intermittent traffic impacts along State Route (SR) 43, Denver and Ninth avenues in Fresno and Kings counties to haul materials to a high-speed rail construction site. Work is scheduled intermittently between 6 a.m. and 6 p.m. starting Monday, Dec. 1, 2025, through...