ABSTRACT
There can be little doubt that the primary barriers to sustainable transport are institutional. Certainly, there are technical and operational barriers to the creation of infrastructure and the vehicles that use it, but most of these are well understood over short and intermediate time horizons and involve fairly routine actions for implementation once institutional impediments are overcome. For example, in the United States, recent experience shows that transport projects costing more than $1 billion require at least 20 years of negotiation, proposal and counter-proposal discussions, to remove institutional impediments and thereby implement the project.
