Tollway in Houston

While in Houston last week I took the wrong exit and ended up on the tollway. I took the first exit to get back but of course it wasn't a cash exit. I was in a rental car with an out of state plate, so how likely is it that I'll get a ticket in the mail? I've surveyed the Houston folks around the office and they're opinions are either I'll get one in a few weeks or it will be ignored since I'm out of state. Anyone have better insight?