California Class C Drivers Practice Test

Stopping your vehicle is a critical part of obeying traffic laws and ensuring road safety. The correct answer is when you see a stop sign because stop signs indicate that you are required to come to a complete stop. This ensures that you yield to any other vehicles or pedestrians before proceeding. It is essential to observe this rule, as failing to stop can lead to accidents and legal repercussions.

For the other options, while they are important considerations, they do not universally require you to stop. For example, at a green traffic light, you are generally permitted to proceed unless there are specific circumstances requiring a stop. Hearing sirens from emergency vehicles typically means you should pull over to the side of the road, but it does not necessarily mean you must stop your vehicle in all situations. When entering a roundabout, you usually yield to vehicles already in the roundabout rather than stopping completely, unless traffic conditions dictate otherwise.