If the car ahead of you is waiting to turn right and you want to go straight, what should you do?

When approaching a situation where the car ahead is waiting to turn right and you intend to go straight, the safest and most appropriate action is to pass on the left or wait for the other vehicle to complete its turn. This is based on standard driving practices where passing on the left allows you to maintain a safe distance while ensuring that you do not interfere with the turning vehicle's path.

Passing on the left is crucial because most vehicles use the right lane for turns and the left lane for driving straight. By doing so, you reduce the likelihood of a collision. If there is not enough space to safely pass, waiting allows you to observe the other driver's actions and proceed once it is safe, thereby ensuring caution and safety for all road users.

The other options present less appropriate responses for this scenario. Sounding your horn may alert the driver but does not address the underlying situation of safely navigating the roadway. Stopping and waiting is advisable in certain situations, but it is often best to assess whether passing on the left is a viable option. Passing on the right can be dangerous, as it can confuse other drivers and is generally not a safe maneuver in this context.