system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
In autosports, what is the apex and racing line?


assistant
The racing line in autosports is an imaginary line in which when followed by the vehicle will provide the most efficient and quickest way through a turn or series of turns.  The apex of the racing line is the ideal point in which the car should be positioned closest to the inside of a curve.  The term, 'hitting the apex' is used when the ideal racing line is followed.