City logistics: Are sustainability policies really sustainable?

Road Freight transport is causing a number of social, environmental and economic negative impacts in many cities around the world. Therefore sustainable city logistics must be the solution to the problems of urban centers, with the main objective of researchers reduce these impacts, without penalizing the needs of cities. Cause of this several sustainable initiatives and policies have been implemented to help reduce them. But are the sustainable policies really sustainable? So this paper aims to evaluate one of these policies in a quantitative way to answer the question. Therefore be presented and implement a model based on VRP logic to evaluate the differences between the distances traveled by vehicles of a logistics company in a city with a policy regulating access and the distance traveled without such regulation. And based on the results obtained attempt draw conclusions to answer the question. Keywords : City logistic, Sustainable policies, Vehicle routing, Access time windows, Genetic Algorithms, City centers