The Texas Transportation Code, Section , requires the Texas Department of Transportation to post a sign at each point at which an Interstate Highway or United States highway enters this state that informs an operator that the use of a portable wireless communication device for electronic messaging while operating a motor vehicle is prohibited and the operator is subject to a fine.

There are 44 statewide locations where an Interstate Highway or US Highway crosses the state line, but Districts may choose to install signs along additional highways that cross the state line as well. To order signs, please contact TRF_Signs for the sign detail.