Highway Engineering (Set-5)

Select the correct statement.

• Nagpur road plan formulae take into account the towns with very large population.

• Nagpur road plan has a target road length of 32 km per 100 square km.

• Second 20-year plan has provided 1600 km of expressways out of the proposed National highway.

• Second 20-year plan allowed deduction of length of railway track in the area while calculating the length of roads.

The sequence of four stages of survey in a highway alignment is

• reconnaissance, map study, preliminary survey and detailed survey

• map study, preliminary survey, reconnaissance and detailed survey

• map study, reconnaissance, preliminary survey and detailed survey

• preliminary survey, map study, reconnaissance and detailed survey

The stopping sight distance depends upon

• total reaction time of driver

• speed of vehicle

• efficiency of brakes

• All of the above

Camber in the road is provided for

• effective drainage

•  counteracting the centrifugal force

• having proper sight distance

• none of the above

Reaction time of a driver

• increase with increase of speed

• decrease with increase of speed

• in same for all speed

• none of the above

The ruling design speed on a National Highway in plain terrain as per IRC recommendations is

• 60 kmph

• 80 kmph

• 100 kmph

• 120 kmph

 If b is wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be

• less than b/2h and greater than coefficient of lateral friction

• less than b/2h and also less than coefficient of lateral friction

• greater than b/2h and also less than coefficient of lateral friction

• greater than b/2h and also grater than coefficient of lateral friction

For a design of superelevation for mixed traffic conditions, the speed is reduced by

• 15%

• 20%

• 25%

• 75%

 On a horizontal curve if the pavement is kept horizontal across the alignment, then the pressure on the outer wheels will be

• more than the pressure on inner wheels

• less than the pressure on inner wheels

• equal to the pressure on inner wheels

• zero

The attainment of superelevation by rotation of pavement about the inner edge of the pavement

• is preferable in steep terrain

• results in balancing the earthwork

• avoid the drainage problem in flat terrain

• does not change the vertical alignment of road