The nation's passenger rail system, Amtrak, published maps showing potential route expansions throughout the country this week that included adding a stop in Columbus and expanding service in Ohio. The map is part of Amtrak's pitch for federal infrastructure funding that would expand conventional rail service by more than 30 routes and as many as 20 million commuters by 2035. There were 32 million commuters who used Amtrak in fiscal year 2019. The "three-C" corridor that has routes running between Cincinnati, Columbus and Cleveland as part of that plan could connect 15 million people. The routes include a Cleveland to Cincinnati route running through Columbus and Dayton that would link the state's four largest metropolitan areas.