According to the Cost Recovery Theorem the revenues from congestion tolls pay for optimal capacity of a facility if user costs are homogeneous of degree zero in usage and capacity, and if capacity is perfectly divisible and supplied with a unit cost elasticity. This paper examines the robustness...

Truck-only lanes and tollways are under study as tools to combat road congestion, enhance safety and reduce other external costs of road traffic. This paper investigates the potential benefits from separating cars and trucks onto different lanes or routes while treating road infrastructure as...