28, 2022 it approved the final route in the San Jose to Merced section. This alignment (Alternative 4) uses the existing Union Pacific Railroad (UPRR) alignment from San Jose to Gilroy as a blended section. East of Gilroy the alignment becomes a pure HSR section with approximately of tunnels through the Pacheco Pass. Trains will be able to travel at even through the tunnels. When tunnel field studies, early engineering, and design work are completed for this section, it will be ready for construction when funding is available. Tunnel construction is anticipated to take up to 6 years to complete once begun. Route travel-time/speed requirements Proposition 1A also set the maximum nonstop travel times between certain destinations on the system: San Francisco–San Jose: 30 minutes; this would require about San Jose–Los Angeles: 2 hours, 10 minutes; this would require about San Francisco–Los Angeles Union Station: 2 hours, 40 minutes San Diego–Los Angeles: 1 hour, 20 minutes Inland Empire–Los Angeles: 30 minutes Sacramento–Los Angeles: 2 hours, 20 minutes In addition, the achievable operating headway between successive trains must be less than 5 minutes. Trains (rolling stock) Acquisition In January 2015, the Authority issued a request for proposal (RFP) for complete trainsets. The proposals received will be reviewed so that acceptable bidders can be selected, and then requests for bids will be sent out. In February 2015, ten companies formally expressed interest in producing trainsets for the system: Alstom, AnsaldoBreda (now Hitachi Rail Italy), Bombardier Transportation, CSR, Hyundai Rotem, Kawasaki Rail Car, Siemens, Sun Group U.S.A. partnered with CNR Tangshan, and Talgo. Due to company acquisitions and mergers since then (CSR merged with CNR, and Bombardier Transportation merged with Alstom), the number of companies now qualified for the tender is seven. The qualified companies are Alstom, Siemens Mobility, Talgo, Hitachi Rail Italy, CRRC, Hyundai Rotem, and Kawasaki Rail Car. An additional factor for the selection of a model is the Buy America regulation for production of rolling stock in the US. The Federal Railroad Administration granted a waiver for two prototypes to be manufactured off-shore. The remaining trainsets would need to be built according to the rules. This requirement was mentioned as a significant reason that Chinese manufacturers dropped out of the Brightline West (then known as XpressWest) project with similar technical trainset specifications. Included in a May 2022 grant request to the Biden administration is a request for funds to purchase