Minimum Recommended Road Width for a National Highway

The minimum recommended road width for a National Highway depends on various factors, including the type of highway, the traffic volume, the type of vehicles expected to use the road, and the design speed. The road width is a critical factor in ensuring the safety and efficiency of the highway.

Factors Affecting Road Width
The following factors are considered when determining the minimum recommended road width for a National Highway:

1. Traffic Volume: Higher traffic volumes require wider roadways to accommodate the flow of vehicles and ensure smooth traffic movement.

2. Vehicle Type: The types of vehicles expected to use the road, such as cars, trucks, buses, or a combination, can influence the road width requirements. Larger vehicles generally require wider lanes for safe maneuvering.

3. Design Speed: The design speed of the highway also plays a role in determining the road width. Higher design speeds may require wider lanes to accommodate the increased vehicle speeds and provide adequate lateral clearance.

4. Geometric Design Standards: National Highway design guidelines specify the minimum horizontal and vertical clearances required for safe and efficient traffic flow. These standards take into account factors such as sight distance, superelevation, and curves, which can impact the road width requirements.

Minimum Recommended Road Width Options
The options provided in the question are as follows:

A) 50
B) 30
C) 25
D) 15

The correct option for the minimum recommended road width for a National Highway depends on the specific conditions and requirements of the project. However, it is important to note that the options provided are not sufficient to determine the accurate road width. The road width can vary widely depending on the factors mentioned above.

Conclusion
Determining the minimum recommended road width for a National Highway involves considering various factors such as traffic volume, vehicle type, design speed, and geometric design standards. The road width plays a crucial role in ensuring the safety and efficiency of the highway. It is essential to consult relevant design guidelines and standards to determine the appropriate road width for a specific project.