Caltrain and the California High-Speed Rail Authority have formed a partnership called the Peninsula Rail Program, which will jointly coordinate and facilitate improvements to Caltrain under Caltrain 2025 and bring high-speed rail to the Peninsula.
Since the preferred alignment for high-speed rail includes the Caltrain corridor, Caltrain 2025 and high-speed rail are intertwined. Therefore, the design solutions for both projects must take into account shared impacts and opportunities.