"Genghis Kahn" wrote in message
...

Are railroad frequencies in the U.S. AM or FM?

They use FM and are usually found from 160.110 MHz to 161.565 MHz, in 15 KHz
steps.

Check this site for some good info on RR freqs:
http://zippy.cso.uiuc.edu/~roma/rr-freqs/

Have fun,

Jackie