Slow moving vehicles that travel at a speed less than mph will have an orange reflective triangle with red around the edges on the rear of the vehicle that should alert other drivers that their speed is not going to increase.

Slow moving vehicles that travel at a sped less than 25 MPH will have
Slow moving vechicles [SMV] are those vehicles that travel on the road at a speed that is less than the recommended speed, example of a slow moving vehicle is tractor. These vehicles must have SMV signs on them to notify other drivers that they would not be travel fast.