Many of the larger terminals use different road channels depending on where the trains are headed and what part of the terminal they're in. In Denver, BNSF uses 161.100 MHz (AAR 66) from near Mineral Ave to the south through the terminal to Brush, CO, 90 miles east of Denver. 161.16 MHz (AAR 70) is used for trains going north on the Front Range Sub towards Cheyenne and farther to the north. Local switchers in the yard and in industries will use different frequencies to avoid interfering with other switch crews. Mechanical inspectors (carmen) use 160.575 MHz for train inspections. Go to the data base listing for the city or line near you to find the frequencies in use near you. You might look to www.trainorders.com as a place to look for photos and info on railroad operations near you. It's divided into "Western Discussion" west of Chicago, Eastern Discussion east of Chicago, and other more specific Boards like Steam or Nostalgia (trains from years ago) or Canadian operations. Membership is $30 a year but there's a lot of talented photographers who post there and inquiries are generally answered quickly. You must be a member to post questions...
