In a turn, what is the Apex?

• A. The exit point of the turn
• B. The highest speed point
• C. The point inside the curve closest to the inside edge
• D. The approach to the turn

Answer: (C)

The main idea here is where the vehicle’s path comes closest to the inside edge of the curve. The apex is the point inside the curve that the car reaches as it negotiates the turn—the innermost part of the path through the corner. Placing the line to pass through this point lets you enter from the outside, clip the inner edge at the apex, and then drive outward smoothly to maximize control and exit speed.

So the apex isn’t the exit point, nor the moment of highest speed, nor the approach into the turn. It’s specifically that inner closest point in the turn itself.