Transponder

AP covers the opening of the first toll lanes in LA county: 110 Freeway Express Lanes that allow solo-drivers to use a carpool lane for a toll that varies with the level of congestion (i.e. congestion pricing). Shoup asks: "Why did it take so long?"
Nov 13, 2012   AP via San Jose Mercury News
<p>A "Black Hat security researcher" claims he has discovered security flaws in the FasTrak toll transponder used by drivers in California and Colorado. However, the story is quickly dismantled as "baloney" by a toll road industry insider.</p>
Jul 14, 2008   Toll Roads News