Question

As per the Indian practice the width of road way (in meters) for major district roads on plain and rolling terrain is

• A. 9
• B. 12
• C. 7.5
• D. 6.25

Hint:

It's crucial to distinguish between carriageway width and roadway (formation) width. Roadway width includes shoulders. Standards vary based on road classification (NH, SH, MDR, ODR, VR) and terrain (plain/rolling vs. mountainous/steep). For Indian practice, IRC codes are the definitive source for these dimensions.

Answer 1

The Correct Option is A

Step 1: Understand Roadway Width Classification in Indian Practice.
In Indian road design practice, the width of the roadway (formation width) for different categories of roads and terrains is specified by the Indian Road Congress (IRC) standards. The roadway width includes the width of the pavement (carriageway) and shoulders. Major District Roads (MDRs) are an important classification in the Indian road network, connecting areas of production and marketing with each other or with National Highways/State Highways.
Step 2: Recall the IRC standards for Major District Roads (MDRs).
According to IRC guidelines for Major District Roads (MDRs):

• On Plain and Rolling Terrain: The standard formation (roadway) width is 9.0 meters. This typically includes a carriageway width of 5.5 meters (for single-lane roads) or 7.0 meters (for two-lane roads), plus shoulders on both sides. For a two-lane carriageway, the total roadway width is often 9.0 meters (7.0m carriageway + 1.0m shoulder on each side).
• On Mountainous and Steep Terrain: The standard formation (roadway) width is generally 6.25 meters.

Step 3: Identify the correct width for the specified conditions.
The question asks for the width of the roadway for major district roads on plain and rolling terrain. Based on the IRC standards, this value is 9.0 meters.
Step 4: Select the corresponding option.
Option (1) 9 matches the standard. $$\boxed{\text{9}}$$