Proposed changes to the state highway system are approved by the Texas Transportation Commission. The commission makes its approvals for a new highway, a highway change or a highway deletion based on the following information:
- Type of highway requested and funding available
- City and county government resolutions requesting the highway change
- Request from local TxDOT District
TxDOT assigns an appropriate number to the highway, prepares the proposed minute order and forwards the final minute order packet to the commission for approval at its monthly meetings. No highway is designated without commission approval.
Texas Memorial Highway System
Memorial Highways are named through the state legislature or by a local government which works with the appropriate TxDOT district for highway signing.
TxDOT keeps a record of the memorial highways but does not designate them (Transportation Code, Chapter 225. The only designated highways with names are Old San Antonio Road (OSR) and NASA Road 1. All other highways are designated with the highway system and a number.
Park Roads that lead to a state park are designated on the State Highway System. Park Roads located within a state park are maintained by TxDOT by law and are not usually designated (Texas Administrative Code, Title 43, Chapter 15, Subchapter F, Section 15.60).