How can you tell if you are over the speed limit?

The correct choice is the one that emphasizes the use of posted speed limit signs and the speedometer to determine if you are exceeding the legal speed limit. Observing speed limit signs provides a clear and legal guideline of the maximum speed allowed in a particular area. Additionally, the speedometer is a direct measurement of your vehicle's current speed, allowing for accurate readings.

Using these tools is reliable because they are designed to provide the necessary information to comply with traffic regulations. Speed limit signs are placed strategically along roads to inform drivers of the limits imposed by law, while the speedometer is built into the vehicle to give an accurate indication of velocity. This combination helps ensure safe driving practices and legal compliance.

Other methods, such as feeling vibrations, watching other vehicles, or listening to the engine sounds, are not effective or reliable for determining speed. They can lead to misjudgments and may place the driver at risk of speeding without realizing it. Therefore, adherence to visible regulations and the use of measurable indicators is the best approach to ensure you remain within the speed limit.