When the speed of traffic flow becomes zero , then
a) traffic density attains maximum value Whereas traffic volume becomes zero
b) traffic density and traffic volume both attain maximum value
c) traffic density and traffic volume both become zero
d) traffic density becomes zero whereas traffic volume attains maximum value
Answer the following questions :
What are the different classifications of road in Urban area ?
What is the scope of aerial surveys in preliminary survey for highway location?
What are the factors on which stopping sight distance depend?
Why should the psychological widening be added to the mechanical widening?
Differentiate between ruling gradient and minimum gradient.
Define level of service.
Define Perpetual Pavement as per IRC: 37-2012.
Why dowel bar and tie bar are provided in rigid pavement?
Differentiate between flakiness index and elongation index.
What are the factors which cause the mud pumping in rigid pavement failure?
Part – B (Answer any four questions)
Calculate the road length required for a district based on Nagpur road plan,
Following data are given below:
Total area = 8100 km2
Agricultural area = 3200 km2
Length of railway track = 75 km
Numbers of villages with population range < 500, 501-1000, 1001-2000,
2001-5000 and above 5001 are 408, 310, 100, 55 and 18 respectively.
Number of towns and village with population range 2001-5000 and 500110000 are 130 and 45 respectively.
Explain briefly the modified classification of road system in India as per third
twenty year road development plan.
(2 x 10)
What are the disadvantages of improper highway alignment? Discuss briefly the
special care to be taken while aligning hill road.
Explain how the final location and detailed survey of a highway are carried out.
Calculate the safe passing sight distance for a four lane two-way NH. The speed
of overtaking vehicle is 70 kmph and acceleration of overtaking vehicle is 0.9
m/sec2. Assume any other data as per IRC.
The design speed of a two lane NH is 85kmph. There is horizontal curve of
radius 240 m on a certain locality. Design the rate of super elevation for mixed
traffic. By how much should the outer edges of the pavement be raised with
respect to the centre line, if the pavement is rotated with respect to the centre
What are the factors on which the design of widening depends? Derive an
expression for finding the extra widening required on horizontal curve.
A valley curve is formed by descending gradient of 2.5% which meets an
ascending gradient of 5%. Design the total length of valley curve if the design
speed is 22 m/sec so as to fulfill both comfort condition and head light sight
distance. Allowable rate of change of centrifugal acceleration is 0.6 m/sec 3,
beam angle is 10 and height of the head light above carriageway is 0.8 m.
Assume any other data as per IRC.
Briefly explain the floating car method for speed and delay study.
What are the various uses of origin and destination studies? Explain any one
method for carrying out O & D survey.