Leaving Washington and driving up Interstate 95 towards Philadelphia I observed miles of cars waiting at a toll booth, spewing carbon dioxide and thousands of.... Leaving Washington and driving up Interstate 95 towards Philadelphia I observed miles of cars waiting at a toll booth, spewing carbon dioxide and thousands of engines idled. This seemed a waste, both in terms of time and economics, but also in terms of the harm done to the planet. Couldn't each car be affixed with a magnetic strip as part of the inspection process so they could at least keep moving through the tollgate?

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