John Levine <
jo...@iecc.com> wrote:
> Although E-ZPass doesn't use an open standard, the Mark IV
> transponders are very widely used. It is my impression that the bars
> to interoperation are far more political than technical. For example,
> I believe that the transponders on the 407 in Toronto and Sunpass in
> Florida are compatible with E-ZPass, but they don't have billing
> arrangements.
No, there are several incompatible transponder standards which are
used in various states.
Florida's SunPass was not compatible with the E-ZPass Mark IV system,
since Florida used Allegro and 6B transponders. But they're
supposedly installing readers at the toll booths which can handle 4
types of transponders, with a goal of eventually accepting E-ZPass.
This would provide one-way compatibility, since SunPass transponders
still would not work in E-ZPass states.
http://www.tollroadsnews.com/node/5810
South Carolina uses Mark IV, but hasn't joined E-ZPass.
The vast majority of systems that aren't already part of E-ZPass use
incompatible transponders: Texas, Oklahoma, California, Washington,
Kansas, Colorado, Minnesota, Georgia, Utah, etc.
What a fiasco. Imagine if you couldn't use your credit cards when you
went on vacation because other states used a different format of
magstripe, or if you were stuck using pay phones because your cell
phone didn't work.
Supposedly Congress passed a funding bill which requires
interoperability by 2016. I'll believe it when I see it.
Jimmy