“The FRA is uniquely positioned to integrate other BIL-mandated planning activities into the CIDP. One particularly relevant example: BIL Sec. 22214 directs the DOT to evaluate the restoration of daily intercity rail passenger service along discontinued Amtrak long-distance routes and any Amtrak long-distance routes that occur on a nondaily basis. Rail Passengers encourages the FRA to integrate Sec. 22214 findings into the CIDP Pipeline as they become available.”