What three elements are affected by speed?

The correct choice identifies the three elements that directly influence speed: the driver, the vehicle, and the roadway. Understanding these elements is crucial in speed detection and overall traffic safety.

The driver's behavior and capabilities—such as awareness, decision-making, and experience—significantly affect how speed is managed and maintained. A skilled driver is more likely to respond appropriately to changing conditions, whereas an inexperienced driver might struggle.

The vehicle itself also plays a vital role in how speed is perceived and handled. Factors such as the vehicle's design, weight, engine power, and braking ability determine how fast it can safely travel and how quickly it can stop.

The roadway conditions, including its design, surface type, and signage, further influence speed management. A well-maintained road with clear markings can encourage safe driving speeds, while poor road conditions or unclear guidance might lead to increased risks.

Together, these three elements create a comprehensive understanding of how speed affects driving dynamics and safety on the roads. The other choices, while they mention valid points related to driving, do not encompass the core elements of speed as effectively as the combination of the driver, vehicle, and roadway.