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Don't forget EZ-Pass. There are readers on various major roads around here, not in a toll capacity. I think they're used by state DOT to assess traffic flow.

Eg: http://www.autoblog.com/2011/06/27/e-zpass-privacy-invasion/

and: http://www.forbes.com/sites/kashmirhill/2013/09/12/e-zpasses...

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Don't forget the RFID tags in your car wheels (TPMS and probably tires): http://www.computerworld.com/article/2519983/data-privacy/ti...

Tire serial numbers are registered with the DOT, too, AFAIK.

The first article says that you don't have to use EZPass if you are concerned about privacy, and the eventual automation of speeding tickets. That won't be true forever. I've run into some tolls that are EZPass ONLY. Some of them read your license plate and send you a bill if you don't have EZPass. And here in Massachusetts, on the Mass Pike, if you don't use EZPass, you will be penalized when you get your bill for road usage. The justification is that scanning your plate and then finding your address costs the government more money.

> That won't be true forever. I've run into some tolls that are EZPass ONLY. Some of them read your license plate and send you a bill if you don't have EZPass.

This is true as of recently for the Golden Gate Bridge as well. :/

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