Impact Evaluation in Transport
The direct benefits of transport projects are well known; paving roads reduces vehicular operating costs, mass transport systems reduce commuting times and road maintenance prolongs their operating lifespan. Impact evaluation reveals a range of ways in which transport projects improve lives. The empirical evidence shows that paved roads encourage preventive healthcare and increase employment opportunities, mass transport systems improve air quality and reduce crime, and satisfaction of road maintenance increases when services are provided by local communities.Impact evaluations generate valuable information for both executing agencies and stakeholders. Their results provide rigorous measurements of the effect of a project, who benefits the most and why. As a result, the evidence generated by well-conducted impact evaluations is increasingly used to attract resources to effective investments and to guide institutional choices.