Thanks for the quick reply Duhey2 ^ . I will be renting from Hertz, and a little research yields that the name of the program is PlatePass and all Hertz, Avis and Budget cars are automatically enrolled in it.

The cameras on the Houston toll roads take a picture of the rental car's plate. The plate is then matched to the car's plate in their database. The rental car companies register all of their cars' plates with this database. Having matched the plate to the database, the toll charge is matched to the car, which in turn is matched to your rental agreement. Then, the charges are automatically billed on the credit card you use to rent the car.

Very clever; it allows you to pay cash for tolls if you wish, but to use fast lanes if you wish without stopping. The only downside is that apparently the lights flash when you go through the fast lane as if you were beating the toll charges.

I don't wish to belabor this but -- does anyone know if PlatePass works for the entire Westpark Tollway, including the part in Fort Bend County??? I assume it does as the Houston tollway authority administers Ft. Bend's roads, but does anyone know for sure?????