I have been using throgs neck Bridge towing tt (Tv 13 chevy suburban gvwr 8600 and tt 14 outback 250rs gvwr 7600) and there is two different amount being charged each other times. Few times it charged...
If I recall correctly, they charge per axle. When you're towing you'll get double hit because of the trailer. I lived in Queens for a year, and that's what happened to me when I'd go through.