Latest Highway Engineering Objective Questions
1.If the stopping distance is 60 meters, then the minimum stopping sight distance for two lane, two way traffic is
30m
60m
120m
180m
ANSWER : : 60m
2.The shoulder provided along the road edge should be
rougher than the traffic lanes
smoother than the traffic lanes
of same colour as that of the pavement
of very low load bearing capacity
ANSWER : : rougher than the traffic lanes
3.If b is the 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 co-efficient of lateral friction
less than b/2h and also less than co-efficient of lateral friction
greater than b/2h and less than co-efficient of lateral friction
greater than b/2h and also greater than coefficient of lateral friction
ANSWER : : less than b/2h and also less than co-efficient of lateral friction
4.Select the correct statement.
Nagpur road plan formula 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.
ANSWER : : Second 20-year plan has provided 1600 km of expressways out of the proposed National highway.
5.On a single lane road with two way traffic, the minimum stopping sight distance is equal to
stopping distance
two times the stopping distance
half the stopping distance
three times the stopping distance
ANSWER : : two times the stopping distance
6.For water bound macadam roads in localities of heavy rainfall, the recommended value of camber is
1 in 30
1 in 36
1 in 48
1 in 60
ANSWER : : 1 in 36
7.To calculate the minimum value of ruling radius of horizontal curves in plains, the design speed is given by
8 kmph
12kmph
16kmph
20 kmph
ANSWER : : 16kmph
8.The terrain may be classified as rolling terrain if the cross slope of land is
upto 10%
between 10% and 25%
between 25% and 60%
more than 60%
ANSWER : : between 10% and 25%
9.Reaction time of a driver
increases with increase in speed
decreases with increase in speed
is same for all speeds
none of the above
ANSWER : : decreases with increase in speed
10.For a constant value of coefficient of lateral friction, the value of required super-elevation increases with
increase in both speed and radius of curve
decrease in both speed and radius of curve
increase in speed and with decrease in radius of curve
decrease in speed and with increase in radius of curve
ANSWER : : decrease in speed and with increase in radius of curve
11.The effect of grade on safe overtaking sight distance is
to increase it on descending grades and to decrease it on ascending grades
to decrease it on descending grades and to increase it on ascending grades
to increase it on both descending and ascending grades
to decrease it on both descending and ascending grades
ANSWER : : to increase it on both descending and ascending grades
12.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
ANSWER : : more than the pressure on inner wheels
13.Camber in the road is provided for
effective drainage
counteracting the centrifugal force
having proper sight distance
none of the above
ANSWER : : effective drainage
14.Coefficient of friction is less when the pavement surface is
rough
dry
smooth and dry
smooth and wet
ANSWER : : smooth and wet
15.The stopping sight distance depends upon
total reaction time of driver
speed of vehicle
efficiency of brakes
all of the above
ANSWER : : all of the above
16.For the design of super elevation for mixed traffic conditions, the speed is reduced by
15%
20%
25%
75%
ANSWER : : 25%
17.The desirable length of overtaking zone as per IRC recommendation is equal to
overtaking sight distance
two times the overtaking sight distance
three times the overtaking sight distance
five times the overtaking sight distance
ANSWER : : five times the overtaking sight distance
18.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
ANSWER : : map study, reconnaissance, preliminary survey and detailed survey
19.As per IRC recommendations, the maximum limit of super elevation for mixed traffic in plain terrain is
1 in 15
1 in 12.5
1 in 10
equal to camber
ANSWER : : 1 in 15
20.When the path travelled along the road surface is more than the circumferential movement of the wheels due to rotation, then it results in
slipping
skidding
turning
revolving
ANSWER : : skidding
21.The ruling design speed on a National Highway in plain terrain as per IRC recommendations is
60 kmph
80 kmph
100 kmph
120 kmph
ANSWER : : 100 kmph
22.Compared to a level surface, on a descending gradient the stopping sight distance is
less
more
same
dependent on the speed
ANSWER : : more
23.The shape of the camber, best suited for cement concrete pavements, is
straight line
parabolic
elliptical
combination of straight and parabolic
ANSWER : : straight line
24.Stopping sight distance is always
less than overtaking sight distance
equal to overtaking sight distance
more than overtaking sight distance
none of the above
ANSWER : : less than overtaking sight distance
25.In case of summit curves, the deviation angle will be maximum when
an ascending gradient meets with another ascending gradient
an ascending gradient meets with a descending gradient
a descending gradient meets with another descending gradient
an ascending gradient meets with a level surface
ANSWER : : an ascending gradient meets with a descending gradient
26.The maximum width of a vehicle as recommended by IRC is
1.85m
2.44 m
3.81 m
4.72 m
ANSWER : : 2.44 m
27.The percentage compensation in gradient for ruling gradient of 4% and horizontal curve of radius 760 m is
0.1 %
1 %
10%
no compensation
ANSWER : : no compensation
28.For design, that length of transition curve should be taken which is
based on allowable rate of change of centrifugal acceleration
based on rate of change of super elevation
higher of (a) and (b)
smaller of (a) and (b)
ANSWER : : higher of (a) and (b)
29.Desire lines are plotted in
traffic volume studies
speed studies
accident studies
origin and destination studies
ANSWER : : origin and destination studies
30.If an ascending gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of summit curve for a stopping sight distance of 80 m will be
zero
64m
80m
60m
ANSWER : : 60m
31.The transition curve used in the horizontal alignment of highways as per IRC recommendations is
spiral
lemniscate
cubic parabola
any of the above
ANSWER : : spiral
32.If the design speed is V kmph and deviation angle is N radians, then the total length of a valley curve in meters is given by the expression
0.38 N V3/2
0.38 (NV3)”2
3.8 NV”2
3.8 (NV3)”2
ANSWER : : 0.38 (NV3)”2
33.Length of a vehicle affects
width of traffic lanes
extra width of pavement and minimum turning radius
width of shoulders and parking facilities
clearance to be provided under structures such as overbridges, under-bridges etc.
ANSWER : : extra width of pavement and minimum turning radius
34.The value of ruling gradient in plains as per IRC recommendation is
1 in 12
1 m 15
1 in 20
1 in 30
ANSWER : : 1 in 30
35.The diagram which shows the approximate path of vehicles and pedestrians involved in accidents is known as
spot maps
pie charts
condition diagram
collision diagram
ANSWER : : collision diagram
36.Which of the following shapes is preferred in a valley curve ?
simple parabola
cubic parabola
spiral
lemniscate
ANSWER : : cubic parabola
37.Select the correct statement.
Traffic volume should always be more than traffic capacity.
Traffic capacity should always be more than traffic volume.
Spot speed is the average speed of a vehicle at a specified section.
85th percentile speed is more than 98th percentile speed.
ANSWER : : Traffic capacity should always be more than traffic volume.
38.For highway geometric design purposes the speed used is
15th percentile
50 “”percentile
85th percentile
98 “”percentile
ANSWER : : 98 “”percentile
39.If ruling gradient is I in 20 and there is also a horizontal curve of radius 76 m, then the compensated grade should be
3 %
4%
5 %
6%
ANSWER : : 4%
40.The maximum design gradient for vertical profile of a road is
ruling gradient
limiting gradient
exceptional gradient
minimum gradient
ANSWER : : ruling gradient
41.The camber of road should be approximately equal to
longitudinal gradient
two times the longitudinal gradient
three times the longitudinal gradient
half the longitudinal gradient
ANSWER : : half the longitudinal gradient
42.Enoscope is used to find
average speed
spot speed
space-mean speed
time-mean speed
ANSWER : : spot speed
43.In case of hill roads, the extra widening is generally provided
equally on inner and outer sides of the curve
fully on the inner side of the curve
fully on the outer side of the curve
one-fourth on inner side and three-fourth on outer side of the curve
ANSWER : : fully on the inner side of the curve
44.Select the correct statement.
Psychological extra widening depends on the number of traffic lanes.
Mechanical extra widening depends on the speed of vehicle.
Psychological extra widening depends on the length of wheel base.
Psychological extra widening depends on the speed of vehicle.
ANSWER : : Psychological extra widening depends on the speed of vehicle.
45.With increase in speed of the traffic stream, the minimum spacing of vehicles
increases
decreases
first decreases and then increases after reaching a minimum value at optimum speed
first increases and then decreases after reaching a maximum value at optimum speed
ANSWER : : increases
46.Highway facilities are designed for
annual average hourly volume
annual average daily traffic
thirtieth highest hourly volume
peak hourly volume of the year
ANSWER : s: c
47.Which of the following is known as design capacity ?
basic capacity
theoretical capacity
possible capacity
practical capacity
ANSWER : : basic capacity
48.The attainment of super elevation by rotation of pavement about the inner edge of the pavement
is preferable in steep terrain
results in balancing the earthwork
avoids the drainage problem in flat terrain
does not change the vertical alignment of road
ANSWER : : avoids the drainage problem in flat terrain
49.Which of the following methods is preferred for collecting origin and destination data for a small area like a mass business center or a large intersection ?
road side interview method
license plate method
return postcard method
home interview method
ANSWER : : license plate method
50.The particular places where pedestrians are to cross the pavement are properly marked by the pavement marking known as
stop lines
turn markings
crosswalk lines
lane lines
ANSWER : : crosswalk lines
51.Select the incorrect statement.
Stop or red time of a signal is the sum of go and clearance intervals for the cross flow.
Go or green time of a signal is the sum of stop and clearance intervals for the cross flow.
Clearance time is generally 3 to 5 seconds.
The cycle length is normally 40 to 60 seconds for two phase signals.
ANSWER : : Go or green time of a signal is the sum of stop and clearance intervals for the cross flow.
52.Centre line markings are used
to designate traffic lanes
in roadways meant for two way traffic
to indicate that overtaking is not permitted
to designate proper lateral placement of vehicles before turning to different directions
ANSWER : : in roadways meant for two way traffic
53.The provision of traffic signals at intersections
reduces right angled and rear end collisions
increases right angled and rear end collisions
reduces right angled collisions but may increase rear end collisions
reduces rear end collisions but may increase right angled collisions
ANSWER : : reduces right angled collisions but may increase rear end collisions
54.As per IRC recommendations, the average level of illumination on important roads carrying fast traffic is
10 lux
15 lux
20 lux
30 lux
ANSWER : : 30 lux
55.The diagram which shows all important physical conditions of an accident location like roadway limits, bridges, trees and all details of roadway conditions is known as
pie chart
spot maps
condition diagram
collision diagram
ANSWER : s: c
56.If the stopping distance and average length of a vehicle are 18 m and 6 m respectively, then the theoretical maxi�mum capacity of a traffic lane at a speed of 10 m/sec is
1500 vehicles per hour
2000 vehicles per hour
2500 vehicles per hour
3000 vehicles per hour
ANSWER : : 1500 vehicles per hour
57.Maximum number of vehicles can be parked with
parallel parking
30� angle parking
45� angle parking
90� angle parking
ANSWER : : 90� angle parking
58.The background colour of the informatory sign board is
red
yellow
green
white
ANSWER : : yellow
59.Equivalent factor of passenger car unit (PCU) for a passenger car as per IRC is
1.0
2.0
0.5
10
ANSWER : : 1.0
60.The entrance and exit curves of a rotary have
equal radii and equal widths of pavement
equal radii but pavement width is more at entrance than at exit curve
equal pavement widths but radius is more at entrance curve than at exit curve
different radii and different widths of pavement
ANSWER : : different radii and different widths of pavement
61.”Dead Slow” is a
regulatory sign
warning sign
informatory sign
none of the above
ANSWER : : regulatory sign
62.When the width of kerb parking space and width of street are limited, generally preferred parking system is
parallel parking
45� angle parking
65� angle parking
90� angle parking
ANSWER : : parallel parking
63.Which of the following is indicated by a warning sign ?
level crossing
no parking
end of speed limit
overtaking prohibited
ANSWER : : level crossing
64.The most economical lighting layout which is suitable for narrow roads is
single side lighting
staggered system
central lighting system
none of the above
ANSWER : : single side lighting
65.A traffic rotary is justified where
number of intersecting roads is between 4 and 7
space is limited and costly
when traffic volume is less than 500 vehicles per hour
when traffic volume is more than 5000 vehicles per hour
ANSWER : : number of intersecting roads is between 4 and 7
66.When the speed of traffic flow becomes zero,then
traffic density attains maximum value whereas traffic volume becomes zero
traffic density and traffic volume both attain maximum value
traffic density and traffic volume both become zero
traffic density becomes zero whereas traffic volume attains maximum value
ANSWER : : traffic density attains maximum value whereas traffic volume becomes zero
67.The most efficient traffic signal system is
simultaneous system
alternate system
flexible progressive system
simple progressive system
ANSWER : : flexible progressive system
68.On a right angled road intersection with two way traffic, the total number of conflict points is
6
11
18
24
ANSWER : : 24
69.Scientific planning of transportation system and mass transit facilities in cities should be based on
spot speed data
origin and destination data
traffic volume data
accident data
ANSWER : : origin and destination data
70.The direct interchange ramp involves
diverging to the right side and merging from left
diverging to the left side and merging from right
diverging to the right side and merging from right
diverging to the left side and merging from left
ANSWER : : diverging to the right side and merging from right
71.With increase in speed of the traffic stream, the maximum capacity of the lane
increases
decreases
first increases and then decreases after reaching a maximum value at optimum speed
first decreases and then increases after reaching a minimum value at optimum speed
ANSWER : : first increases and then decreases after reaching a maximum value at optimum speed
72.The maximum number of vehicles beyond which the rotary may not function efficiently is
500 vehicles per hour
500 vehicles per day
5000 vehicles per hour
5000 vehicles per day
ANSWER : : 5000 vehicles per hour
73.When a number of roads are meeting at a point and only one of the roads is important, then the suitable shape of rotary is
circular
tangent
elliptical
turbine
ANSWER : : tangent
74.When two equally important roads cross roughly at right angles, the suitable shape of central island is
circular
elliptical
tangent
turbine
ANSWER : : circular