The More Stringent, the Better? Rationing Car Use in Bogotá with Moderate and Drastic Restrictions
研究了波哥大Pico y Placa计划中适度与严厉限行措施对汽车使用和空气污染的影响，发现两种措施均未改善空气质量或减少汽车使用，严厉措施反而导致汽油消费、车辆保有量和早高峰一氧化碳浓度略有上升。
Abstract Rationing car use based on license plate number has become a popular policy in several cities around the world to address traffic congestion and air pollution. This paper studies the effects of the moderate and drastic driving restrictions imposed as part of the Pico y Placa program on car use and air pollution in Bogotá. Using data on ambient carbon monoxide, gasoline consumption, and vehicle sales and registrations, no evidence of an improvement in air quality or a reduction in car use is found in either phase of the program. On the contrary, there is some indication that, relative to the moderate phase, gasoline consumption, vehicle ownership, and carbon monoxide in the morning peak tended to increase slightly when drastic restrictions were implemented.