RAILROADS: Radio on Wheels

In the six-mile-long Moffat Tunnel the radio conked out. But otherwise the first two-way FM radio communication link between engine and caboose was a success. It was tested last week on a Denver & Rio Grande Western Railroad heavy freight, making a 1,140-mile round trip between Denver and Salt Lake City.

General Electric engineers who made and installed the equipment estimated its cost at $1,500 a train. Delighted D. & R. G. officials and trainmen agreed that the device would soon pay for itself. Hitherto, train crews could communicate with one another...