ABSTRACT
Urban traffic congestion is a manifestation of an imbalance in the supply/demand equation, with demand typically exceeding supply. It can thus be addressed either by providing more infrastructure (supply) or by utilising modes more efficient as people movers than the passenger car (demand). There are limits to which provision of infrastructure can be employed as a solution to the problem and, in many cities across the world, these limits have already been reached. Geometric planning and design must provide an infrastructure supportive of public transport in order to offset the undoubted convenience of the passenger car.
