supercross circuit
Sometimes covered, man-made track that is composed of earth or a mixture of sand and clay; it is strewn with obstacles and bumps for jumps.
markers 
Long ribbons on the sides of the track that delimit a safety zone for the racers and spectators.
straw bales 
Protective barriers placed at the curves to absorb impact in the event a racer skids out.
multiple jumps 
Series of several bumps that the racer clears in a single jump, as opposed to clearing each jump separately.
start area 
The starting line must be wide enough to accommodate the racers lined up abreast; each one needs a breadth of 3.3 ft.
bump 
Rounded protrusion on the circuit that constitutes an obstacle for the racers.
riders 
Racers participating in a motorcycling event.
bridge 
Humped structure that constitutes an obstacle for the racers.
triple jump 
Obstacle made up of three bumps in a row that the racer must clear in one jump; the motorcycle must land on the far incline of the third bump.
obstacles 
Elements, such as bumps, spines and bridges, that the racers must clear during an event.
spine 
High bump enabling the racers to perform spectacular jumps.
marshall 
One of the officials along the track who warn the competitors of potential danger by means of yellow flags.
starting gate 
Transversal device that serves as the motorcycles’ starting point; it folds up or down so that the racers can push off.