ACZL wrote:
If taking 90, be prepared for tolls. Can figure out how much NY tolls are by going to the T-ways web site. If possible, try to get a NY E-Z pass ahead of time and see to what states it works in (it's a lot of them). Sadly, some states have E-Z passes just for their systems.
Any state or agency that is a member of the EZ Pass consortium will accept transponders and accounts from any other, and their transponders will likewise be accepted at any member's facilities. That's the whole point of the EZ Pass consortium, in fact. Some do offer discounts or other deals for their own account holders that are not applied to outsiders, but any transponder is accepted and charged at the standard rates.
Some states have other electronic tolling systems that are not part of EZ Pass and are not interoperable.
New York (well, the NY thruway commission, but not the port authority of New York and New Jersey) offers a thruway motorhome plan that can save a significant amount for motorhome drivers on the thruway--basically car rates rather than tall vehicle rates, or around a 50% savings in the standard tolls. It's not necessarily the simplest discount to get as you need to convince them that you actually have a motorhome to use it with.