At first glance, an 18-speed transmission sounds like overkill. After all, most cars get by with five or six gears. But semi trucks are built for an entirely different purpose, and that is moving ...

The U.S. Department of Transportation has withdrawn a decades-old rulemaking to require speed limiters on heavy vehicles. The National Safety Council warns the move will lead to more fatalities on U.S ...

Limiting the speed of vehicles weighing more than 26,000 pounds may have put more trucks on the roads and pushed more trucks onto side streets. The U.S. DOT said speed limiters on trucks would have ...

The Trump administration is hitting the brakes on an Obama-era plan that would have created a de facto national speed limit as low as 60 mph for big rigs and buses traveling American highways. The ...