scbwr wrote:
Use of different transponders is a bit vague when you look at the EZ Pass website for different states. Some states indicate that you don't need a separate transponder when towing and that when you go throught the toll booth, it will detect the trailer and charge accordingly. BUT, some of these states state that you should check with other states when traveling. I've used my transponder for just my truck (no additional axles) in other states and haven't had a problem. I can't say for sure whether I was charged for extra axles or not. If I were signing up for the first time, I think I would pick a state that doesn't require a separate transponder and just use it!
We have three passes, two for the coach, and one for the toad. One coach pass gets used when we're towing the toad, with the others tucked away in shielded bags, and the other coach pass is used when not towing. The reason for the two passes is because we have the NY Thruway's "Motorhome Plan" were we are charged passenger car per axle tolls for the coach. The tags are vehicle type and axle count specific. Since we rarely use the Thruway without the toad in tow, we just keep the four axle tag in place most of the time.