Jason Barnes reviews the last few decades and the future of tolling technology. Tolling and charging technology has evolved significantly over the last three decades and that evolution is perhaps best illustrated by reductions in or complete removal of impedances to physical progress. Once, it was customary for a driver to pull up to a barrier, make some form of cash payment to a human operative in a booth, and then wait for the barrier to be raised before proceeding. Humans were eventually complemented and
