Trade and transport corridors—major routes that facilitate the movement ofpeople and goods between regions and between countries—have existed formillennia. They enable regions and countries to offer high-capacity transportsystems and services that reduce trade and transport costs by creating economiesof scale. Regional corridors are particularly important to landlocked countries,often providing the only overland routes to regional and international markets.Despite a long and complex history, guidance is often lacking on how to design,determine the components to include, and analyze the impact of corridor projects.The Trade and Transport Corridor Management Toolkit fills this void.The Toolkit synthesizes the experiences of the World Bank and other developmentagencies in assessing, designing, implementing, and evaluating the impactof trade and transport corridor projects. It saves project developers the task oflooking for the best available tools and ensures greater consistency to facilitatecomparison and benchmarking.The Toolkit will also be of immense value to policy makers in provincial andnational governments as well as regional economic institutions, for several reasons:• Corridors affect the space economy of countries; they are best developed withclear estimates of the spatial impacts that can be expected.• A corridor system has multiple components, including infrastructure (roads,railways, ports), transport and logistics services, and regulations; it is importantto appreciate the linkages between them, particularly as the overall performanceof a corridor is determined by the weakest component.• Many parties with varying interests and motivations have a stake in corridordevelopment. The Toolkit argues for their full participation in corridordevelopment processes and operations.The best functioning modern corridors in the world did not happen by accident;they are often the results of coordinated development and cooperation over manyyears. The general principles outlined in this Toolkit should help project teams,government officials, logistics service providers, and the trade communityto better appreciate both the importance of good corridor project design andthe challenges of, and possibilities from, improving corridor performance.