President Joe Biden’s promise to improve the nation’s infrastructure has renewed interest in the idea of a high-speed railroad connecting New York and Boston through a 16-mile tunnel under Long Island Sound.

Officials say the North Atlantic Rail plan would create an electric high-speed line that would allow travel at well over 200 mph.

It would cut the current train trip of about 3 1/2 hours between the two cities to just over 1 1/2 hours.

Amtrak’s current trains can go as fast as 150 mph but rarely do on the current aging track.

The estimated cost of the 20-year project is over $100 billion.