It could be coming to Philadelphia, according to this inquirer article. From every angle, driving is a classic example of what happens when individuals are not responsible for the marginal burden they put on the system. They rarely pay for their portion of road use, almost always have a free or government subsidized parking, and the cumulative effects of vehicle CO2 emissions are bourn by everyone in the world.
It's good to see some governments trying to take a proper accounting of the true costs of driving.
By the way, what is up with the inquirer website ads? They seem to be slowing down my computer to a crawl.