This report sets out several of the recent advances, and suggests the most promising approaches, to the quantification and valuation of some of the wider economic benefits that flow from transport-related development. Economic appraisal can offer decision-makers important insights into the expected socio-economic impacts of transport projects. The sophistication of modern supply chains and the growing prominence of the services sector have increased the interest of decision-makers in economic benefits beyond those traditionally captured in transport appraisal.