Monthly meeting of the Texas Transportation Commission.

Number assigned by the department to identify each of the 254 counties in the state.

(FHWA) Federal overseer of all state Departments of Transportation (DOT), including TxDOT.

(IH) A highway so designated by AASHTO.

(M/O) A document requesting action by the Texas Transportation Commission. This is the document used to request approval of a new, changed, or deleted highway.

Roadway not designated on the State Highway System and not maintained by TxDOT (i.e. city street, county road).

Roadway designated on the State Highway System and maintained by TxDOT.

(PR) Roadway to a recognized state or national park, so designated by the Texas Transportation Commission. Roadways within state parks are maintained by TxDOT by law and no designation is necessary.

(RR) Only one?Ranch Road 1; considered part of the Farm to Market Road system.

(SH) A roadway so designated by the Texas Transportation Commission (includes NASA Road 1 and Old San Antonio Road "OSR").