DP3176 Estimating Urban Road Congestion Charges

Author(s): David M G Newbery, Georgina Santos
Publication Date: January 2002
Keyword(s): congestion tolls, efficient charges, road pricing, traffic congestion
JEL(s): H11, H51, R48
Programme Areas: Public Economics
Link to this Page: cepr.org/active/publications/discussion_papers/dp.php?dpno=3176

Economists wishing to analyse road congestion and road pricing have usually relied on link-based speed-flow relationships. These may provide a poor description of urban congestion, which mainly arises from delays at intersections. Using the simulation model SATURN, we investigate the second-best proportional traffic reduction and find that linear speed-flow relations describe network flows quite well in eight English towns, though the predicted congestion costs and charges overstate those apparently required in our second best model. We then confront the results with feasible optimal cordon charges, and find them reasonably correlated, but imperfect predictors.