A truck traveling over the speed limit hit a traffic control vehicle and burst into flames in a rollover. The lone driver had passed several vehicles before smashing into the rear of a signal truck. The signal vehicle was equipped with a flashing arrow warning drivers to change lanes because of construction ahead. The driver of the signal truck was injured, and the driver of the truck was burned to death. Speed kills. Driving at excess speed prevents you from seeing obstructions in time to avoid them. Observe speed limits when you drive for your employer and on your own time.