Transportation Problems

Three new road links are to be constructed P, Q, and R with different road lengths. The details of population and products served as follows:

Suggest the order of priority for phasing the road construction program based on maximum utility approach.

• RPQ

• PQR

• QRP

• RQP

Find head light sight distance and Intermediate sight distance respectively, for a decreasing gradient of 2% for a design speed of 80 kmph. Consider the remaining data as per IRC. Given friction = 0.35.

• 132, 132

• 264, 132

• 132, 264

• 264, 264

The speeds of overtaking and overtaken vehicles are 80 kmph and 50 kmph respectively. The acceleration of overtaking vehicles is 2.5 kmph/sec. Spacing between vehicles = 16 m, reaction time of driver is 2 sec. Calculate the safe OSD on two way traffic four lane divided national highway.

• 406.44

• 193.11

• 130.05

• 210.32

Super elevation for mixed traffic condition (as per IRC) if the design speed is 100 kmph and coefficient of lateral friction 0.15 on a horizontal curve in plains of radius 500m is

• 7

• 5.67

• 3.2

• 9.6

A valley curve is formed by a descending gradient of 1/20 meets with an ascending gradient of 1/30. Design speed 80 kmph allowable rate of change of centrifugal acceleration is 0.61 m/s². Length of valley curve for comfort is

• 38.64 m

• 77.28 m

• 42 m

• 84 m

The resultant traffic count taken between 5 PM to 6 PM are as 1300, 800, 1150, 950 for every 15 minutes period. What is the peak hourly factor (PHF) for this free way? Also determine actual (Design) traffic volume?

• 0.807, 4200

• 0.913, 4200

• 0.913, 5200

• 0.807, 5200

If the spot speeds in kmph are 50, 40, 60, 54, and 45. Then the time mean speed and space mean speed are

• 49.8, 48.82 kmph

• 48.82, 49.8 kmph

• 49.8, 49.8 kmph

• 48.82, 48.82 kmph

A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

• 2.4

• 2.5

• 3

• 3.6

The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:

• 15

• 16

• 18

• 25

If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is

• 50

• 56

• 70

• 80