TREDIS® is the "Transportation Economic Development Impact System" – an interactive system of tools that enables transportation planners and consultants to conduct economic development impact evaluation and benefit-cost analysis for transportation investments. It is the only system equally applicable for highway, bus rail, aviation, marine and multi-modal projects. TREDIS® is registered with the US Patent and Trademark Office, Reg. 78,766,496.

Latest News v3.5 Improvements (April 2008) TREDIS -- an expanding presence on the web New Quarterly Newsletter Freight Analysis with TREDIS New Case Studies - Wisconsin, Maine, Appalachia TREDIS Forum -- Q&A Discussion Board New Article - Seven Ways to Use TREDIS