6.  Stopping sight distance is the minimum distance available on a highway which is the ___.

A. distance equal to the height of the driver’s eye above the road surface

B. distance of sufficient length to stop the vehicle without collision

C. distance visible to a driver during night driving

D. height of the object above the road surface


Answer: B   distance of sufficient length to stop the vehicle without collision



7.  Stopping sight distance and frictional coefficients are ____.

A. unrelated

B. directly proportional to each other

C. either directly or inversely proportional to each other depending on the nature of pavement

D. inversely proportional to each other


Answer: D    inversely proportional to each other




Stopping Sight Distance SSD = SSD = Vt + V2 /2gf



8. The Star and Grid pattern of road network was adopted in ____.

A. Delhi Road Plan

B. Nagpur Road Plan

C. Bombay Road Plan

D. Lucknow Road Plan


Answer: B       Nagpur Road Plan




In the Nagpur Road Plan, the roads were divided into five categories:

National Highway (NH)

State Highway (SH)

Major District Roads (MDR)

Other District Roads (ODR)

Village Roads (VR)

The two formulae were based on star and grid pattern of road network. Hence, first formula is called star formula and the second formula is called grid formula.

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9. The length of summit curve on a two lane two way highway depends upon ____.

A. required overtaking sight distance

B. allowable rate of change of centrifugal acceleration

C. required stopping sight distance

D. coefficient of lateral friction


Answer: A    required overtaking sight distance




Length of summit curve depends upon:

(i) SSD for single lane two way highway

(ii) OSD for two lane two way highway



10.  The value of the camber recommended for cement concrete roads in areas of heavy rainfall is ____.

A. 1 in 33

B. 1 in 50

C. 1 in 40

D. 1 in 25


Answer: B   1 in 50




Types of road surface

Range of camber in areas of rainfall range

            Heavy     to     Light

Cement concrete and high type bituminous surface

1 in 50 (2.0%) to 1 in 60 (1.7%)

Thin bituminous surface

1 in 40 (2.5%) to 1 in 50 (2.0%)

Water bound mecadam, and gravel pavement

1 in 33 (3.0%) to 1 in 40 (2.5%)


1 in 25(4.0%) to 1 in 33(3.0%)



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