railroad tunnel

Arkansas has seven railroad tunnels but only one highway tunnel.

Seems we just missed him down there in the railroad tunnels.

The centerpiece of the train ride is passing through a railroad tunnel 2.4 miles long.

Too busy talking to nut cases in railroad tunnels, I guess.

This year, engineers are to begin studies on the building of a 14-mile electric railroad tunnel through the Andes.

His voice sounded as if it came from the far end of a five-mile-long railroad tunnel.

There has also been a railroad tunnel since the nineteenth century.

It has been used in railroad tunnels and for a community antenna system.

It is the longest railroad tunnel in the United States.

It was the longest railroad tunnel in Illinois throughout its years of service at 2,493 feet (760 m).