As early as 2003, UNCTAD developed a supply chain management approach applied to transit transport services (Hansen and Annovazzi-Jakab, 2008) which, emulating assembly lines in manufacturing industry sectors, allowed for cluster development and transit corridors stakeholders’ cooperation to improve transit operations. The methodology, based on the observation of the sequence of interventions in transit operations, showed that actors along the chain operate on a user– provider or client–supplier relationship. Although players’ actions are interrelated and dependent on each other, they often do not occur in the way and time expected by the user of the service provided. This is mainly due to a lack of exchange of information between users and providers regarding their respective needs and goals, which in turn results from a lack of trust among the players. Such malfunctions result in two types of activities taking place in the operation of the transit chain: those adding value at a cost and those adding cost at no value. The latter translate into unnecessary delays, high costs and efficiency losses. UNCTAD implemented this approach from 2003– 2007 in the framework of a technical assistance project conducted in three pilot corridors. The project showed that clusters as cooperative platforms would allow stakeholders along transit corridors to acquire a comprehensive understanding of their respective roles along the whole transit supply chain. It also revealed the impact of the actions of their members on the performance of various stages along the transit chain as well as the benefits accruing from collectively optimizing the chain as a whole, as opposed to trying to maximize individual returns. Such collaborative schemes constitute an essential step towards building a new vision and common goals for the different players in transit systems with the common aim of ending the unreliability of transit operation.