Boost Challenge is an event that the player participates in alone. In this event, the player's goal is to go through all the event's checkpoints, which take the form of blue laser gates created between two green cars, within a specific time limit. During this event, a time counter appears on the top of the screen's HUD that counts down during the whole event. If this time counter goes down to zero, the event will end and the player will lose. To extend one's time limit, the player has to pass through checkpoints or green laser gates.
Cars in different colors also appear along the whole race track. Each color indicates a specific behavior for that car. The player must steer clear of the cars and aim exclusively for the checkpoints. If a player collides with another car, they will skid out of control and be slowed down a bit. Sometimes though, the player can obtain Gloves or Super Gloves from Item Boxes along the track, which can protect the player from impacts with the other cars.
The following types of cars appear in Traffic Challenge:
These cars move in straight lines and are scattered in large numbers around the track.
These cars are in numbers than the green cars. They constantly move from side to side, which can sometimes take the player off the road.
The least common of the cars, which are stylized after police patrol cars. Only one of them appear at every checkpoint. They actively try to get in the player's way.
In addition to cars, two types of laser gates also appear in Traffic Challenge:
A blue laser gate created between two green cars. If the player hits one of the cars, the laser will disappears. However, if the player passes in-between the cars, the checkpoint will recognized as passed. When passing through this laser gate, it will provide eleven seconds of extra time.
A smaller, green laser gate created between two green cars. If the player hits one of the cars, the laser will disappears and the time bonus can no longer be obtained. When passing through this laser gate, it will provide four seconds of extra time.
The player can choose the level of difficulty (C for Easy, B for Medium, A for Hard, and S for Expert). The higher the level, the more stars the player will receive for their victory (from 1 for Easy to 4 for Expert). The difficulty level will also affect which and how many cars that will appear during the event:
10 easy waves: Less traffic, only green cars.
12 medium waves: More traffic, green and yellow cars.
15 hard waves: More traffic, green, yellow and police cars.
15 expert waves: More traffic, green, yellow and police cars.