RELLIS Recollections, the book, is now available for purchase through Texas A&M University Press.

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TTI Overview

The original charter of the Texas A&M Transportation Institute (TTI), as set down by the A&M Board of Directors in 1950, charged the agency with enlisting the resources of the college to conduct research activities involving virtually all forms of transportation.

A member of the Texas A&M University System, TTI has a breadth and depth of programs, facilities and capabilities unsurpassed by any other higher-education-affilated transportation research organization in the country. The Institute's research and development programs have resulted in significant breakthroughs across all facets of transportation.

With expertise in areas such as engineering, planning, economics, policy, public engagement, landscape architecture, environmental science, computer science and the social sciences, TTI researchers serve as objective transportation experts. They provide a resource to local, state and national agencies and groups, helping them solve transportation challenges and make informed decisions.

Gregory Winfree is agency director for TTI.


Greg Winfree has served as Agency Director of the Texas A&M Transportation Institute since December 2016. Greg joined the U.S. Department of Transportation’s Office of the Assistant Secretary for Research and Technology in March 2010 as Chief Counsel and was later sworn in as Assistant Secretary for Transportation in January 2014. He received a J.D. from Georgetown University, and previously served as corporate counsel for several Fortune 500 corporations.