Under Texas Transportation Code section 545.352, any excess in speed on the established limits is considered unlawful. The default speed limits for certain roadways are: Alleys- 15 mph Streets- 30 mph ...

Houston must conduct expensive traffic studies just to set the speed limit at 20 mph on neighborhood streets. HB 5253 / SB 2725 would cut the red tape.

Other states that have an 80-mph max speed limit are: Idaho, Montana, Nevada, Oklahoma, South Dakota, Texas, Utah and Wyoming. In some parts of Texas, toll roads are capped at 85 mph.