NEW YORK (AP) Federal transportation officials are sharing details of long-term plans for the aging Northeast Corridor rail line.

The corridor experiences regular delays on Amtrak between Washington, D.C., and Boston and on regional rail lines such as New Jersey Transit, due to 100-year-old infrastructure and crowded tracks.

At an open house Wednesday in New York, the Federal Railroad Administration laid out its vision for expanding service and making existing service more efficient. Proposals under consideration range from integrating schedules and fares for Amtrak and regional rail lines, to building a second rail line to carry trains at speeds up to 220 mph.

Many of the plans factor in a new tunnel and tracks under the Hudson River, a project that was halted four years ago by New Jersey Gov. Chris Christie.