E-ZPass Interagency Group
- Provides electronic toll collection interoperation. Lists members and gives contact information.
- http://www.e-zpassiag.com/

Electronic Toll Collection System
- Metro Road Systems' division. Includes client list.
- http://www.metroroadsystems.com/toll_collections.shtml

Highway Toll Administration
- Provides electronic toll collection services. Site includes client information.
- http://www.htallc.com/

Halifax-Dartmouth Bridge Commission
- Authority for the Angus L. Macdonald and A. Murray MacKay Bridges that connect Halifax to Dartmouth in Nova Scotia, Canada.
- http://www.hdbc.ca/

MACPASS - Automated Toll Collection System
- Service available for crossing of various bridges in the Maritime Provinces of Canada. Site includes FAQ, price information, and application forms.
- http://www.macpass.com/

Roam
- Electronic toll collection system used around Sydney, Australia, including on the M7. Includes e-TAG and e-PASS transponder information.
- http://www.roam.com.au/

International Bridge, Tunnel and Turnpike Association
- Alliance of toll operators and associated industries. Includes news and resources.
- http://www.ibtta.org/

TollRoadsNews
- Online private newsletter providing information and commentary.
- http://www.tollroadsnews.com/

Traffic Technologies, Incorporated
- Consultants for Intelligent Transportation Systems (ITS). Has links to clients.
- http://www.t-t-i.com/

Toll Facilities in the United States
- Full and partial lists with details, courtesy the Federal Highway Administration.
- http://www.fhwa.dot.gov/ohim/tollpage.htm

M-TAG
- Electronic toll collection system for bridges and tunnels in Baltimore, Maryland, U.S.
- http://www.m-tag.com/

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 system.
- http://www.howstuffworks.com/e-zpass.htm

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

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