Ray,

I asked about the toad tag when I got the EZ Pass for our coach. The lady said we didn't need one for the tow vehicle as the fee was charged by the axle (how does it know how many?) and it was not an issue.

I didn't argue with her and the alarm never goes off when I am towing my trailer or toad, so I didn't worry any more about it.

They also didn't ask how many axles the coach had when I signed up for the tag. They just asked the make / model / tag number and added it to my account. Go figure.