>>I know you can listen to the engineers with scanners but can you also listen to them on a CB?<<
No.
This will be a very, very basic explanation.
The frequencies of the CB radio channels 1-40 fall into the Longwave AM Radio band, which is roughly 26.965 to 27.405 MHz. Those frequencies on the frequency scale are just above the frequency of commercial AM radio, which is roughly 530-1710 kHz. The 96 AAR channels used by U.S. Railroads are in an FM band 160-161 MHz (MegaHertz), which is above commercial FM radio channels (88MHZ-108MHz)
Here's a very basic rundown:
This is a little more detailed:
From:
Here is a very complicated and exacting diagram of U.S. radio frequency allocations:
>>What is the frequency for Union Pacific's shoreline subdivision?<<