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Assessing Productivity Impacts of Transportation Investments: Guidebook

NCHRP Report 786

For the National Cooperative Highway Research Program (NCHRP), EDR Group led an international team in assessing ways to measure and calculate the productivity impacts of transportation projects. The final report from this project (NCHRP Report 786) develops a framework and guide for calculating the economic productivity impacts of transportation investments. It is designed for use by state, regional and local agencies to aid in evaluation of proposed projects. The report defines the various facets of productivity, available metrics and the factors that link transportation system changes to economic productivity impacts. Since agencies differ in their resources and capabilities, the guidebook presents a general framework of calculation steps that should be carried out to estimate elements of direct productivity impact.

The guide explains how those steps can be carried out using methods ranging from simplistic to sophisticated, and discusses implications of those choices It identifies data requirements and sources, and explains how available tools can be used to assess transportation reliability, accessibility and connectivity impacts. It then presents a series of options for using coefficients, elasticity factors and/or models to assess impacts on economic efficiency, agglomeration and supply chain technology change that underlie (and drive) productivity change. Case study examples are provided to illustrate these calculations. Finally, the report discusses how productivity impact measures can be incorporated into transportation investment decision making – through use of multi-criteria analysis, benefit-cost analysis or economic impact analysis.

The report was authored by staff of EDR Group, together with System Metrics Group, Institute for Transport Studies-University of Leeds, David Simmonds Consultancy, Prime Focus, Sauder School of Business-University of British Columbia, and University of Kent.

 

FINAL REPORT: GUIDEBOOK

VOLUME 1: LITERATURE REVIEW

Report Summary

Power Point Presentation

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