Checkpoint is an event type in Single Player Career and consists of racing through all gates before the given timer reaches zero. Checkpoint only utilizes one type of standard Power-ups, nitro and a non standard powerup "time bonus". After passing throught the last gate the remaining seconds decide how many lights will be scored depending on the event's goal targets.
Every gate you pass will add 17 seconds to your timer and every "Time bonus" adds 2 seconds.
Find a route that passes through as many timer and nitro powerups as possible. Try to maintain a constant speed and don't hit anything.