Since directions for navigation must be very precise, from the amount of turn required to the immediate need for braking and acceleration, the information relayed has to be more than what could be conveyed by a passenger in the shotgun seat. Therefore, the team approached the challenge by integrating the information as completely as possible. Drivers wear a vest that provides force feedback indicating the speed of the car. There is a click counter with audio cues built into the steering wheel. Directional commands are spoken. There's even a tactile map that uses blasts of compressed air to indicate obstacles around the car and information about the road itself.