The canceled ARC tunnel under the Hudson River wouldn't have increased Amtrak's capacity. A new proposal could. New Jersey's U.S. senators are working with Amtrak to push a new tunnel project that would connect New Jersey with new rail tracks in an expanded Penn Station in Manhattan. The project would cost billions, but it would also let Amtrak run eight more trains, something project supporters believe fits in with the country's high-speed rail plans.
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