A general strike halted the movement of U.S. railroads.

The first troop sleepers enter service on U.S. railroads.

It is the oldest U.S. railroad still operating under its original name and charter.

This is particularly beneficial at high altitudes, as are often encountered on western U.S. railroads.

Accounts of his system were published in railroad journals, and adopted by many leading U.S. railroads.

No other U.S. railroad offers such a program.

Cab signals were subsequently adopted by several other U.S. railroads, especially on passenger lines.

Despite the difficulties outside the systems mentioned, U.S. railroads still play a major role in the nation's freight shipping.

The U.S. railroads, for instance, would not have been built without British capital.

U.S. railroads have historically used a far greater variety of signaling systems than other countries.