Final answer:
The road sign that indicates 'no turn on red' is used to restrict drivers from making a right turn when the traffic light is red for safety purposes.
Step-by-step explanation:
The road sign that indicates 'no turn on red' is a traffic sign used to restrict drivers from making a right turn when the traffic light is red. This sign is commonly found at intersections to prevent accidents and ensure the safety of pedestrians and other vehicles. It is important for drivers to obey this sign as it helps maintain the flow of traffic and prevents any potential collisions.