Flatonia PD (occasionally a DPS too) patrol this area at night by either sitting in the center median strip or on the shoulder (generally the westbound side) and radar traffic. You’ll get a way with 5 over, maybe even more…but if you go 10 over, you’re definitely going to get it! They sometimes slip outside their jurisdiction (town) a bit. I don’t know if local PD have local jurisdiction only or county wide.