Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2170613 Traffic Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2170613 Date: 15/11/2018
Subject Name: Traffic Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define : operating speed, design speed, space mean speed. 03
(b) How do different vehicular characteristics affects road features ? 04
(c) A test car was used on a north-south road 0.75 km long, and the following
data, for the moving car was collected.
North trip
no.
Travel
time(along)
in min
No. of
vehicles met
against
No of
vehicles
overtaking
test car
No of
vehicles
overtaken
by test car
1 2.65 85 1 0
2 2.70 83 3 2
3 2.35 77 0 2
4 3.00 85 2 0
5 2.42 90 1 1
South trip
no.
Travel
time(along)
in min
No. of
vehicles met
against
No of
vehicles
overtaking
test car
No of
vehicles
overtaken
by test car
1 2.33 110 2 0
2 2.71 115 0 2
3 2.48 120 0 0
4 2.54 125 1 1
5 2.16 105 0 2
Calculate traffic volume, average travel time and space mean speeds in both
directions.
07
Q.2 (a) Explain (any three) physical factors of road user. 03
(b) Explain about classified traffic volume count survey with observation table. 04
(c) A vehicle is accelerating on an upward gradient of 1.5 % with a rate of
0.8m/sec
2
, from initial speed of 15 to 25 km/h. Calculate various resistances
encountered by the vehicle using following data :
1. Mass of vehicle : 1500 kg.
2. Coefficient for rolling resistance : 0.02
3. Frontal area of vehicle : 3.5 m
2
4. Coefficient for air resistance : 0.40 kg/m
3
07
OR
(c) A driver travelling at 50 km/hr behind another vehicle decides to overtake it
and presses the accelerator. The accelerating behavior of the car is described
by the following equation.
????
????
= 1.22 - 0.015 V
Where, V is speed in m/sec and t is time in sec
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2170613 Date: 15/11/2018
Subject Name: Traffic Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define : operating speed, design speed, space mean speed. 03
(b) How do different vehicular characteristics affects road features ? 04
(c) A test car was used on a north-south road 0.75 km long, and the following
data, for the moving car was collected.
North trip
no.
Travel
time(along)
in min
No. of
vehicles met
against
No of
vehicles
overtaking
test car
No of
vehicles
overtaken
by test car
1 2.65 85 1 0
2 2.70 83 3 2
3 2.35 77 0 2
4 3.00 85 2 0
5 2.42 90 1 1
South trip
no.
Travel
time(along)
in min
No. of
vehicles met
against
No of
vehicles
overtaking
test car
No of
vehicles
overtaken
by test car
1 2.33 110 2 0
2 2.71 115 0 2
3 2.48 120 0 0
4 2.54 125 1 1
5 2.16 105 0 2
Calculate traffic volume, average travel time and space mean speeds in both
directions.
07
Q.2 (a) Explain (any three) physical factors of road user. 03
(b) Explain about classified traffic volume count survey with observation table. 04
(c) A vehicle is accelerating on an upward gradient of 1.5 % with a rate of
0.8m/sec
2
, from initial speed of 15 to 25 km/h. Calculate various resistances
encountered by the vehicle using following data :
1. Mass of vehicle : 1500 kg.
2. Coefficient for rolling resistance : 0.02
3. Frontal area of vehicle : 3.5 m
2
4. Coefficient for air resistance : 0.40 kg/m
3
07
OR
(c) A driver travelling at 50 km/hr behind another vehicle decides to overtake it
and presses the accelerator. The accelerating behavior of the car is described
by the following equation.
????
????
= 1.22 - 0.015 V
Where, V is speed in m/sec and t is time in sec
07
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2
Determine:-
(1) The maximum speed of vehicle.
(2) The maximum rate of acceleration.
(3) The rate at which the vehicle is accelerating after 3 seconds given by
????
????
= (? ? ?V0) e
-?t
Q.3 (a) Define with respect to traffic signal : phase, lost time, red interval 03
(b) Explain trial cycle method of signal design. 04
(c) What are the advantages and disadvantages of providing traffic signals? 07
OR
Q.3 (a) Define with respect to traffic signal : cycle, cycle length, interval, 03
(b) Explain Webster?s method of signal design. 04
(c) Draw at least 5 signs of each (not to scale)
Regulatory signs, Warning signs and Informatory signs.
07
Q.4 (a) Explain enoscope method of spot speed study. 03
(b) Find Time mean speed and space mean speed from following data.
Speed range(kmph) Frequency
0-10 8
10-20 18
20-30 26
30-40 30
40-50 18
04
(c) What is the importance of highway lighting ? State the factors influencing
night visibility.
07
OR
Q.4 (a) Enumerate with an example about intersection delay count survey. 03
(b) Calculate Time mean speed and Space mean speed from the following
spot speed observations in km/hr.
50,40,60,54,45,31,72,58,43,52,46,56,43,65,33
04
(c) Draw layout of lighting on
(i) Single side of road
(ii) Both side of road(staggered)
(iii) Central
(iv) At T intersection
(v) At cross roads
07
Q.5 (a) Define: Luminous flux, foot candle, Luminaire 03
(b) State advantages and disadvantages of over-pass or flyover. 04
(c) Draw a neat sketch of rotary intersection, show all design components and
explain about them in brief.
07
OR
Q.5 (a) Indicate and explain how spacing of street lighting is decided. 03
(b) Prepare a check list of facilities to be provided at any terminal. Justify your
answer for each of facility to be provided.
04
(c) Draw a neat sketch of
(i) Partial clover leaf intersection
(ii) Full clover leaf intersection.
(iii) Diamond interchange.
07
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This post was last modified on 20 February 2020