What is the purpose of a speed limit?

Answer: B — To provide a safety guideline for drivers

The purpose of a speed limit primarily revolves around providing a safety guideline for drivers. Speed limits are established based on various factors, including road conditions, visibility, the presence of pedestrians, and the general layout of the area. By setting maximum speeds, they help to minimize the risk of accidents and enhance the overall safety for all road users, including pedestrians, cyclists, and other vehicles. While it is true that complying with speed limits can indirectly contribute to better traffic flow and may also have environmental benefits, these are not the primary reasons for their establishment. Speed limits are fundamentally designed to enhance safety, ensuring that drivers can react appropriately to changing conditions and hazards encountered on the road.