ETTM On The Web - A site dedicated to providing the most complete and up to date information on Electronic Toll and Traffic Management (ETTM). Also includes maps of the toll roads in the US.
Automated Highways - An article from Scientific American, by James H. Rillings.
Ramp Meters - A list of all cities that use ramp metering systems.
E-Z Pass - E-Z Pass is an electronic toll collection system that is spreading all over the northeast US
Toll Roads of America - A list and detailed information about all the toll roads in the US.
