Usually just county roads. State roads and federal highways receive federal tax dollars.

That’s not to say you can’t get federal or state grants for some roadway related local projects, but these roads described would be primarily county roads built with borrowed money (or local tax dollars if they’re available, which they usually aren’t, hence the bond issue kicking the can down the road).

Increasingly in Collin and Denton county, highways are becoming privatized. This is great for maintenance and quality, but it is definitely regressive for the poorer. However, these counties are rapidly becoming more populated by more wealthy individuals and txdot is anything but rapid.