We extend the traditional road investment model, with its focus on capacity and congestion as measures of capital and its utilization, to include free-flow speed as another dimension of capital. This has practical importance because one can view free-flow speed as a continuous proxy for road...

We use a simple analytical framework to derive pricing rules for oligpolistic airlines at airports that are served by competitive airlines as well. The pricing rules show how the degree of internalization of marginal congestion costs depends on market structure. The analysis illustrates the...

The bottleneck model of congestion with endogenous scheduling has become a standard tool of transportation economics. It provides surprising insights about the time pattern of congestion, optimal pricing, and many distinct inefficiencies of unpriced equilibria including wrong departure order...