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HowStuffWorks: How E-ZPass Works
Fully illustrated tutorial explains E-Zpass, an electronic toll-collection system consisting of a 900-MHz band car transponder, antenna, lane controller, LAN and host computer syst em.
http://www.howstuffworks.com/e-zpass.htm

Toll Roads of America
A list and detailed information about all the toll roads in the US.
http://www.contrib.andrew.cmu.edu/~mn2n/tollroads.html

E-Z Pass
Electronic toll collection system that is common in the Northeast U.S.
http://www.ezpass.com/

HowStuffWorks: How Intelligent Highways Will Work
Graphic narrative shows the future freeway's new, cheaper technology and explains how ubiquitous digital devices will aid in easing our traffic woes, perhaps using triangulation.
http://www.howstuffworks.com/intelligent-highway.htm