Signing Practices
Details for freeway and expressway guide signing for street-named highways are shown in Figures 7-8 through 7-10.
Crossing Street Names on Bridges.
On freeways and expressways in large urban areas, the crossing street name may appear on the crossing roadway bridge. This practice is allowed to assist motorists in using maps. These signs are usually a little smaller than the vertical clearance signs on the bridges and located so they won't interfere with the vertical clearance signs. These are not guide signs, but simply street signs mounted on bridges and paid for, installed, and maintained by TxDOT.If a city initiated street name change requires existing signs to be modified, the city will be responsible for all costs.

Figure 7-8. Typical signing on an expressway or freeway for an intersected highway route that is a named city street (For information on oversize street named signs at intersections, see Section 3 of this chapter.)

Figure 7-9. Special case signing on an expressway or freeway for an intersected highway route that is a named city street

Figure 7-10. Street signs on city street for named freeway route
Street named signs are usually the city’s responsibility under a standard maintenance agreement.