The main objective of this study is to examine the reduction in the number of road accidents in the metropolitan area … Colombian road safety. That way, we find that the annual aggregate benefit of decreasing traffic fatalities in AMBAQ was US$ 1 …

urbanization is higher around train stations, but the effect of railway travel on road congestion is small. By contrast, if train … stations are omnipresent there is little effect on urban spatial structure, but a considerable decrease in congestion. With … regard to the supply of train stations, these findings suggest that there is an important policy trade-off between congestion …

issues like congestion and directional asymmetries in demand, differentiated supply in terms of vehicle size and in …

earlier flight. We show that the expected user costs of US air traffic delays are underestimated by 16% if arrival delay …