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.
FHWA Retroreflectivity Sign Sheeting ID Guide
MUTCD — Interim Approval for Use of Clearview Font for Positive Contrast Legends on Guide Signs
MUTCD — New sign minimum retroreflectivity levels
AASHTO M 268-10 — Standard Specification for Retroreflective Sheeting for Traffic Control
TxDOT — Special Specification 8251 Reflectorized Pavement Markings with Retroreflective Requirements
Research conducted by TTI has also been used to modify standards for:
as well as many others.
