I was curious to find out if anyone has ever thought about putting advertisements on coal cars, auto racks, tankers etc. A good question would be: How many people are going to see these advertisements? Another question would be: Is it legal to put advertising on rail cars?
One other possibility that I've been studying is intermodal...either on containers or trailers.
I guess I'm just putting it out there to see if anyone is doing it or thought about it!