What should you do if you wish to pass the car ahead of you on a two-lane road?

The recommended action when passing a car on a two-lane road involves signaling your intentions clearly to ensure safety. Using a left turn signal informs both the driver you are about to overtake and other road users, including those behind you, of your maneuver. This helps prevent confusion and potential accidents, as it indicates that you are preparing to change lanes for the purpose of passing.

Sounding your horn can also be a precautionary measure, alerting the other driver of your intention to pass, especially in situations where visibility is limited or the other driver may not be aware of your presence. However, this action is typically less emphasized than signaling.

While neither option of solely signaling or just sounding the horn works alone, combining both actions effectively communicates your intent. Thus, signaling with a left turn signal is necessary, and sounding your horn can be a useful safety measure, making the combination of both actions a correct approach to passing safely on a two-lane road.