Texas OKs Fastest Speed Limit in U.S. from GOVERNING: State government news on politics, management & financ Some experts say the new 85 mph speed limit is likely to result in more traffic-related deaths. Only one other state, Utah, allows motorists to drive 80 mph, according to the Governors Highway Safety Association. www.governing.com/news/state/Fastest-Speed-Limit-in-US-to-be-on-New-Texas-Road.html