What is the primary purpose of a clear zone?

• A. To provide additional lane width for vehicles
• B. To enhance the aesthetic appeal of the road
• C. To create a safe area for errant vehicles
• D. To manage stormwater runoff effectively

Answer: (C)

The primary purpose of a clear zone is to create a safe area for errant vehicles. This concept is integral to road design as it aims to minimize the severity of accidents that can occur when a vehicle leaves the traveled way. The clear zone provides a buffer area free of roadside obstacles, allowing vehicles that may unintentionally stray off the road a safer space to stop or regain control.

By ensuring that this area is clear of hazards such as trees, utility poles, or large ditches, road designers significantly reduce the risk of serious injury or fatality for drivers who might lose control. The dimensions of a clear zone can vary based on factors such as road type, traffic speed, and type of roadside features.

The other options do not align with the primary goal of a clear zone. For example, while additional lane width may improve traffic flow, it does not serve the primary function of vehicle safety associated with clear zones. Aesthetic enhancement contributes to the visual appeal of roads but does not address the safety aspect that the clear zone is designed to provide. Lastly, managing stormwater runoff is important for environmental purposes, but this is separate from the objectives of creating a clear zone for traffic safety.