The Fundamental Law of Road Congestion: Evidence from US Cities
研究了美国城市道路车道公里数对车辆行驶里程的影响，发现车道增加导致行驶里程同比例增长，且公共交通无法缓解拥堵，对交通规划者评估道路建设效果有参考价值。
We investigate the effect of lane kilometers of roads on vehicle-kilometers traveled (VKT) in US cities. VKT increases proportionately to roadway lane kilometers for interstate highways and probably slightly less rapidly for other types of roads. The sources for this extra VKT are increases in driving by current residents, increases in commercial traffic, and migration. Increasing lane kilometers for one type of road diverts little traffic from other types of road. We find no evidence that the provision of public transportation affects VKT. We conclude that increased provision of roads or public transit is unlikely to relieve congestion.