A slow-moving vehicle, such as a tractor or other piece of large farm machinery is unable to travel at highway speed. It is identified by an orange and red triangular sign mounted on the rear of the vehicle. These signs help motorists recognize the vehicle ahead more quickly. The sooner you can identify a slow-moving vehicle the more time you have to respond by reducing your speed. Slow-moving vehicles may make wide turns at unmarked entrances to the right or left of the roadway. Some farm equipment is wider than the road itself.