1. Important MCQ’s
1. Sharper vision is concentrated in the zone formed by a cone whose angle is:
(A) 30
(B) 100
(C) 50
(D) None of these
2. Maximum width of vehicle as per IRC is:
(A) 5m (B) 2.44m
(C) 3m (D) 6m
3. Which of the following is traffic volume measurement method?
(A) Pneumatic Hose (B) Radar Method
(C) Magnetic Detector (D) All of these
4. Which of the following is Spot Speed Study method?
(A) Enoscope method (B) Elevated observation
(C) Photographic Method (D) All of these
5. Upper safe limit of to avoid congestion is:
(A) 15th (B) 85th
(C) 98th (D) 100th
6. Angle of peripheral vision in horizontal plane is____________
7. Define Amber time
8. Write an expression for Total Cycle time according to Webster Method.
9. Stop is which type of sign:
(A) Regulatory (B) Warning (C) Informatory (D) None of these
10. In a rotary if one road is most important then the shape of rotary is:
(A) Circular (B) Elliptical (C) Turbine (D) Tangent
Angle of peripheral vision in vertical plane is____________
2. Write an expression for basic capacity.
3. Which of the following is traffic volume measurement method?
(A) Pneumatic Hose (B) Radar Method
2. (C) Magnetic Detector (D) All of these
4. Which of the following is Spot Speed Study method?
(A) Enoscope method (B) Elevated observation
(C) Photographic Method (D) All of these
5. Lower safe limit of to avoid congestion is:
(A) 15th (B) 85th
(C) 98th (D) 100th
6. Sharper vision is concentrated in the zone formed by a cone whose angle is:
(A) 30
(B) 100
(C) 50
(D) None of these
7. Write an expression for Total Cycle time according to Webster Method.
8. In a rotary if one road is most important then the shape of rotary is:
(A) Circular (B) Elliptical (C) Turbine (D) Tangent
9. Stop is which type of sign:
(A) Regulatory (B) Warning (C) Informatory (D) None of these
10. Maximum Length of vehicle as per IRC is:
(A) 15m (B) 20m
(C) 18m (D) 10m
Short answer
1. Explain all the types of traffic characteristics.
2. In case of Accident study if two vehicles moving towards intersection collides at
intersection then explain the change in velocities in collision diagram with neat Sketch.
3. What do you mean by 4 Phase Signal? Explain every case of 4phase signal with
diagram.
4. Define the following:
a) 98th
percentile speed
b) 85th
percentile speed
3. c) 50th
percentile speed
d) 15th
percentile speed
5. What are the different types of Traffics Signs? Aslo write different types of traffic
operations.
6. Discuss all the vehicular characteristics and its dimensions. If a vehicle is moving with a
velocity of 30kmph and its breaking distance is 10m. then find out the coefficient of skid
resistance.
7. Define the following:
a) Amber Time
b) Cycle Length
c) Interval
8. Discuss the different methods to measure spot speed in brief.
9. In case of Accident study if a vehicle collides with a parked vehicle then explain the
change in velocities in collision diagram with neat Sketch.
10. What do you mean by Level of Service. Explain in brief all the types of LOS.
Long answer:
1. Following table shows the speed range and frequency of vehicles. Find out the speed at
15th
percentile, 20th
percentile, 45th
percentile, 80th
percentile and 98th
percentile.
Speed
Range
0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100
Frequency
10 40 50 50 150 250 300 90 40 20
2. Explain all types of Traffic Capacity. A single lane unidirectional highway has a design
speed of 65kmph. The brake reaction time of a driver is 2.5sec and average length of
vehicle is 5m, coefficient of friction is 0.4. Find out the capacity of road in veh/hr/lane.
3. Design and explain all the parameters of Rotary intersection with neat and labeled
sketch.
Parameters Vehicle A Vehicle B
Before Collision From west From south
After Collision 500
North of West 600
East of North
S1 35 20
S2 15 36
4. 4.
-Calculate the velocities before collision, at the time of collision and after collision.
5. The average normal flow of traffic on cross roads A and B during period are 400 and
250PCU per hour, the saturation flow values are 1250 and 1000 PCU/hr respectively.
The all red time required for pedestrians crossing is 12sec. Design two phase traffic
signal by Webster Method.
1. The average normal flow of traffic on cross roads A and B during period are 400 and
250PCU per hour, the saturation flow values are 1250 and 1000 PCU/hr respectively.
The all red time required for pedestrians crossing is 12sec. Design two phase traffic
signal by Webster Method.
2. A vehicle applies brakes and skids through a distance equal to 40m. Before colliding with
another parked vehicle, the weight of the which is 60% of the former. From
fundamental principles compute the initial speed of moving vehicle if the distance which
both vehicles skid through after the collision before stopping is 12m. Assume average
friction coefficient as 0.6
3. Explain all types of Traffic Capacity. A single lane highway has a design speed of
85kmph. The brake reaction time of a driver is 2.5sec and average length of vehicle is
6m, coefficient of friction is 0.4. Find out the capacity of road in veh/hr/lane.
4. Discuss all the design parameters of Rotary Intersection with diagram.
5. Following table shows the speed range and frequency of vehicles. Find out the speed at
15th
percentile, 50th
percentile, 85th
percentile and 98th
percentile.
Speed
Range
0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100
Frequency
10 40 50 50 150 250 300 90 40 20
Wieght of Vehicle 4.5 ton 6.0 ton
Coefficient of Friction =0.55
