What indicates the maximum allowable speed on a road?

What indicates the maximum allowable speed on a road?

• A. Road condition signs
• B. Vehicle types
• C. Speed limit signs
• D. Traffic signals

Answer: (C)

The maximum allowable speed on a road is indicated by speed limit signs. These signs are critical for road safety as they inform drivers of the highest speed they are legally permitted to travel under normal driving conditions. Speed limit signs are established based on various factors, including road design, traffic patterns, and safety considerations, and they are essential for maintaining orderly traffic flow and reducing the risk of accidents.

Other options, while relevant to road use, do not specifically denote maximum speed limits. For instance, road condition signs provide information about the state of the roadway, vehicle types refer to classifications of vehicles and may influence speed indirectly but do not set speed limits, and traffic signals regulate the flow of traffic and right-of-way but do not indicate maximum speeds. Thus, speed limit signs serve the unique function of clearly defining lawful speed for each segment of road, making them the correct choice in this context.