Amtrak Northeast Corridor, New York to Washington.

The route passes through an S-curve during which it crosses to the north side of the Amtrak Northeast Corridor.

MD 197's modern bridge across the Amtrak Northeast Corridor was built in 1981.

US 40's mainline also includes several low bridges, including the bridge which the Amtrak Northeast Corridor uses to cross the route.

Shortly after passing over the Amtrak Northeast Corridor, US 1 reaches North Avenue.

Charles Street crosses over several tracks of the Amtrak Northeast Corridor and enters the Charles North neighborhood.

The interstate then passes over the Amtrak Northeast Corridor and then a part of the city of Wilmington on a high viaduct.

The P&W operates occasional passenger excursions on its own lines and sometimes over the Amtrak Northeast Corridor.

MD 564's modern bridge across the Amtrak Northeast Corridor, which is perpendicular to the railroad, was completed in 1994.

"Outside of the coastal areas of California and the Amtrak Northeast Corridor, you don't see this phenomenon," Professor Gyourko said.

The route passes through an S-curve during which it crosses to the north side of the Amtrak Northeast Corridor.

MD 197's modern bridge across the Amtrak Northeast Corridor was built in 1981.

US 40's mainline also includes several low bridges, including the bridge which the Amtrak Northeast Corridor uses to cross the route.

Shortly after passing over the Amtrak Northeast Corridor, US 1 reaches North Avenue.

Charles Street crosses over several tracks of the Amtrak Northeast Corridor and enters the Charles North neighborhood.

The interstate then passes over the Amtrak Northeast Corridor and then a part of the city of Wilmington on a high viaduct.

The P&W operates occasional passenger excursions on its own lines and sometimes over the Amtrak Northeast Corridor.

At the Landover end, the line connects to the Amtrak Northeast Corridor (NEC).

MD 564's modern bridge across the Amtrak Northeast Corridor, which is perpendicular to the railroad, was completed in 1994.

"Outside of the coastal areas of California and the Amtrak Northeast Corridor, you don't see this phenomenon," Professor Gyourko said.