# For a two – lane rural highway, the (I.R.C.) have recommended that the design volume per day should be:

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For a two – lane rural highway, the (I.R.C.) have recommended that the design volume per day should be:

1.

10,000 passenger cars per day with a peak hour volume of 12% of the average daily volume

2.

5,000 passenger cars per day with a peak hour volume of 10% of the average daily volume

3.

9000 passenger cars per day with a peak hour volume of 8% of the average daily volume

4. 1000 passenger cars per day with a peak hour volume of 10% of the average daily volume
5.

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Correct Answer - Option 2 :

5,000 passenger cars per day with a peak hour volume of 10% of the average daily volume

Explanation:

Design Volume:

Design Volume or Design Service Volume can be defined as the maximum hourly volume at which vehicles can reasonably be expected to traverse a point or uniform section of a lane or roadway during a given time period under the prevailing roadway, traffic and control conditions while maintaining a designated level of service.

Table 4 of IRC 64: 1990 gives clear guidelines regarding the Capacity of Roads in Rural Area.

• But according to the IRC, the design volume is also dependent on the type of terrain; such as plain, rolling or hilly area.
• And along with the given data, the peak hour volume can be 8 - 10% of the average daily volume for two lane roads.

The data is shown here in a tabulated form-

 Terrain Curvature (Degrees per Kilometer) Design Service Volume in PCU/Day Plain Low (0-50) 15000 High (above 51) 12500 Rolling Low (0-100) 11000 High (above 101) 10000 Hilly Low (0-200) 7000 High (above 201) 5000