So if you see the exclamation Vickrey! applied to a study on this website, you'll know what it means.

Bill would be been very pleased with the opportunities for pricing highway services that EZPass technology offers.

See Warm Memories of Bill Vickrey for more about this extraordinary man.

Nic Tideman: Applications of Land Value Taxation to Problems of Environmental Protection, Congestion, Efficient Resource Use, Population, and Economic Growth

The logic of efficient environmental protection applies with few changes to issues of congestion. Parking meters are simple example of the application of land value taxation to solving a problem of congestion. If there is a shortage of parking places (at a zero price) then the introduction of parking meters (charging rent for the use of land) can relieve the shortage. Ideally, the price of a parking meter should vary by time of day to reflect variations in the demand for parking places. The ideal fee would equate supply and demand at each time of day, with lanes of streets devoted to parking only where the revenue generated by the parking fees exceeds the value of the additional lane in speeding traffic. Perhaps in a few years we will have parking meters with prices that vary by time of day. We certainly have the technology. In the meantime, we get by with meters that charge a single price throughout the part of the day when demand is greatest.

Charging rent for parking is only a small step from charging rent for cars that are moving on city streets. The more cars there are on the streets, the slower everyone goes. The marginal cost of having one more car on the streets is the value of the extra travel time that everyone else endures because of the one additional car. In many places, the congestion cost of traffic is less than the cost of administering a system of congestion fees. But this is not the case everywhere. William Vickrey used to say that his estimate of the cost in additional delays of having one more car in midtown Manhattan in the middle of the day was about $20,000 per hour. He would go on to say that this did not imply that people should be charged $20,000 per hour for using the streets of midtown Manhattan. He had estimated marginal cost at the present level of usage. The efficient charge -- perhaps $25 per hour -- would reduce use of the streets so greatly that the marginal congestion cost of street usage would equal the price. Efficient congestion prices for using the streets of Manhattan (or Boston or other large cities) would not merely charge for ordinary usage but would also entail special charges for anyone who double-parked or parked in some other illegal way that created congestion. If we could keep track of the movements of vehicles, then for any vehicle that stood still ahead of backed-up vehicles that wanted to move, there would be a charge for the resulting congestion cost, which would be quite high. Companies making deliveries to downtown areas might decide that it was far better to make deliveries at night than to tie up the streets in the day.

Congestion charges also apply to bottlenecks such as bridges and tunnels. Whenever such a facility has cars backed up seeking to use it, efficiency is improved by applying a toll that reduces demand to capacity. The same output is produced, revenue is generated, and the waste of queuing is avoided.

The efficiency of congestion pricing would also apply to such public facilities as airports and parks. When airlines want to have more take-offs and landings than an airport can accommodate, it is efficient and just to allocate take-off and landing slots by price. Unfortunately, Congress, at the behest of airlines, has prohibited airports from doing this, requiring them instead to allocate take-off and landing slots by non-price means. ... read the whole article

An Open Letter to Mikhail Gorbachev (1990), signed by Bill Vickrey and 29 others