Which aspect of traffic control devices helps to convey information to road users?

Traffic control devices are essential for managing road safety and providing clear information to road users about navigation, rules, and safety. All of the options listed—traffic lights, pavement markings, and speed bumps—play a significant role in this communication.

Traffic lights are designed to regulate vehicle and pedestrian movement at intersections by providing clear signals through red, yellow, and green lights. They effectively communicate when to stop, prepare to stop, or proceed, ensuring orderly traffic flow and enhancing safety.

Pavement markings serve to delineate lanes, guide vehicle positioning, indicate pedestrian crossings, and communicate various regulations such as no-parking zones. These markings are crucial in helping drivers navigate the road safely while adhering to legal requirements.

Speed bumps are physical devices placed on the roadway that encourage drivers to reduce their speed in certain areas, such as near schools or residential neighborhoods. They convey the message that caution is needed, enhancing safety for pedestrians and other vehicles.

By incorporating all three of these elements into traffic control, road safety is significantly improved. Together, they provide a comprehensive suite of information that supports safe driving behaviors, making the choice that encompasses all of them the most accurate answer.