Much of the research conducted by the Texas A&M Transportation Institute’s Signs and Markings Program is implemented through changes or additions to state, national, and international documents such as the Manual on Uniform Traffic Control Devices and ASTM standards and specifications.
The following are examples of the standards developed by TTI Visibility Research.
MUTCD — New sign minimum retroreflectivity levels
Research conducted by TTI has also been used to modify standards for:
as well as many others.