What are the restrictions/rules for hunting on or near railroad tracks?

I always see deer near the railroad tracks but I can't find anything in the regs about it. I understand it would be considered private property because it is an active track. However, there are no "no trespassing" signs or any orange markers of any type. Is it legal to hunt near the tracks?

Answer: 

Railroad rights of way are private property. 
One should always ask permission to hunt on private property.
Even though the railroad right of way may not be posted ‘no trespassing’ a hunter could be held civilly and criminally liable for damages that may occur on any private property. 

Answered on: 
Monday, November 23, 2015 - 12:30 PM MST