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Recent questions and answers in Traffic Engineering
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1
GATE Civil 2021 Set 2  Question: 13
Relationship between traffic speed and density is described using a negatively sloped straight line. If $v_{f}$ is the free flow speed then the speed at which the maximum flow occurs is $0$ $\frac{v_{f}}{4}$ $\frac{v_{f}}{2}$ $v_{f}$
asked
Mar 1
in
Traffic Engineering
by
jothee
(
5.2k
points)
gatecivil2021set2
trafficstudiosonflowandspeed
0
votes
0
answers
2
GATE Civil 2021 Set 2  Question: 24
In a threephase signal system design for a fourleg intersection, the critical flow ratios for each phase are $0.18, 0.32$, and $0.22$. The total loss time in each of the phases is $\text{2 s}$. As per Webster's formula, the optimal cycle length (in $\text{s}, \textit{round off to the nearest integer}$) is _______________
asked
Mar 1
in
Traffic Engineering
by
jothee
(
5.2k
points)
gatecivil2021set2
numericalanswers
trafficsignal
designbywebstersmethod
0
votes
0
answers
3
GATE Civil 2021 Set 1  Question: 25
A signalized intersection operates in two phases. The lost time is $3$ seconds per phase. The maximum ratios of approach flow to saturation flow for the two phases are $0.37$ and $0.40$. The optimum cycle length using the Webster's method (in seconds, round off to one decimal place) is ______________
asked
Feb 20
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gatecivil2021set1
numericalanswers
signaldesign
webstersmethod
0
votes
0
answers
4
GATE Civil 2021 Set 1  Question: 35
On a road, the speed – density relationship of a traffic stream is given by $u=700.7k$ (where speed, $u$, is in $\text{km/h}$ and density, $k$ is in $\text{veh/km}$). At the capacity condition, the average time headway will be $0.5 \:s$ $1.0 \:s$ $1.6 \:s$ $2.1 \:s$
asked
Feb 20
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gatecivil2021set1
trafficstudiosonflowandspeed
0
votes
0
answers
5
GATE Civil 2021 Set 1  Question: 37
Vehicular arrival at an isolated intersection follows the Poisson distribution. The mean vehicular arrival rate is $2$ vehicle per minute. The probability ($\textit{round off to two decimal places}$) that at least $2$ vehicles will arrive in any given $1$minute interval is _______________________
asked
Feb 20
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gatecivil2021set1
numericalanswers
staticalanalysisoftrafficdata
poissondistribution
0
votes
0
answers
6
GATE Civil 2021 Set 1  Question: 53
Spot speeds of vehicles observed at a point on a highway are $\text{40, 55, 60, 65 and 80 km/h}$. The spacemean speed (in $\text{km/h}$, $\textit{round off to two decimal places}$) of the observed vehicles is ___________________
asked
Feb 20
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gatecivil2021set1
numericalanswers
trafficstudiosonflowandspeed
0
votes
0
answers
7
GATE2020CE145
Traffic volume count has been collected on a $2$lane road section which needs upgradation due to severe traffic flow condition. Maximum service flow rate per lane is observed as $1280\:veh/h$ ... are Regular Commuters', the number of extra lane(s) (round off to the next higher integer) to be provided, is ______.
asked
Feb 28, 2020
in
Traffic Engineering
by
jothee
(
5.2k
points)
gate2020ce1
numericalanswers
peakhourfactor
trafficflow
0
votes
0
answers
8
GATE2020 CE29
The traffic starts discharging from an approach at an intersection with the signal turning green. The constant headway considered from the fourth or fifth headway position is referred to as discharge headway effective headway intersection headway saturation headway
asked
Feb 13, 2020
in
Traffic Engineering
by
jothee
(
5.2k
points)
gate2020ce2
trafficengineering
transportationengineering
signaldesign
0
votes
0
answers
9
GATE2020 CE220
For an axle load of $15$ tonne on a road, the Vehicle Damage Factor (round off to two decimal places), in terms of the standard axle load of $8$ tonne, is __________.
asked
Feb 13, 2020
in
Traffic Engineering
by
jothee
(
5.2k
points)
gate2020ce2
numericalanswers
axleload
trafficengineering
transportationengineering
0
votes
0
answers
10
GATE2020 CE221
$24$$h$ traffic count at a road section was observed to be $1000$ vehicles on a Tuesday in the month of July. If daily adjustment factor for Tuesday is $1.21$ and monthly adjustment factor for July is $0.913$, the Annual Average Daily Traffic (in veh/day, round off to the nearest integer) is __________.
asked
Feb 13, 2020
in
Traffic Engineering
by
jothee
(
5.2k
points)
gate2020ce2
numericalanswers
staticanalysisoftrafficdata
0
votes
0
answers
11
GATE2017 CE236
Two cars P and Q are moving in a racing track continuously for two hours. Assume that no other vehicles are using the track during this time. The expressions relating the distance travelled $d$ (in km) and time $t$ (in hour) for both vehicles are given as P: $d=60 \: t$ Q: ... would be $15$ km at $30$ minutes $15$ km at $15$ minutes $30$ km at $30$ minutes $30$ km at $15$ minutes
asked
Aug 7, 2019
in
Traffic Engineering
by
gatecse
(
4k
points)
gate2017ce2
trafficengineering
transportationengineering
0
votes
0
answers
12
GATE2019 CE1: 21
The maximum number of vehicles observed in any five minute period during the peak hour is $160$. If the total flow in the peak hour is $1000$ vehicles, the five minute peak hour factor (round off to $2$ decimal places) is _______
asked
Feb 14, 2019
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gate2019ce1
numericalanswers
trafficengineering
transportationengineering
peakhourfactor
0
votes
0
answers
13
GATE2019 CE2: 44
The uniform arrival and uniform service rates observed on an approach road to a signalized intersection are $20$ and $50$ vehicles/minute, respectively. For this signal, the red time is $30 \: s$, the effective green time is $30 \: s$, and the cycle ... average delay per vehicle using the approach road during a cycle length (in $s$, round off to $2$ decimal places) is __________
asked
Feb 12, 2019
in
Traffic Engineering
by
Arjun
(
8.7k
points)
gate2019ce2
numericalanswers
trafficengineering
transportationengineering
0
votes
0
answers
14
GATE2016222
If the total number of commercial vehicles per day ranges from $3000$ to $6000$, the minimum percentage of commercial traffic to be surveyed for axle load is $15$ $20$ $25$ $30$
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce2
trafficengineering
transportationengineering
axleload
surveys
0
votes
0
answers
15
GATE2016253
The critical flow ratios for a threephase signal are found to be $0.30, 0.25$ and $0.25$. The total time lost in the cycle is $10 \: s$. Pedestrian crossings at this junction are not significant. The respective Green times (expressed in seconds and rounded off to the nearest integer) for the three phases are $34, 28$, and $28$ $40, 25$, and $25$ $40, 30$, and $30$ $50, 25$, and $25$
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce2
trafficengineering
transportationengineering
signaldesign
0
votes
0
answers
16
GATE2016254
A motorist traveling at $100$ km/h on a highway needs to take the next exit, which has a speed limit of $50$ km/h. The section of the roadway before the ramp entry has a downgrade of $3 \%$ and coefficient of friction $(f)$ is $0.35$. In order to enter the ramp at the maximum allowable speed limit, the braking distance (expressed in m) from the exit ramp is __________
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce2
numericalanswers
trafficengineering
transportationengineering
speed
0
votes
0
answers
17
GATE2016122
In a onelane oneway homogeneous traffic stream, the observed average headway is $3.0$ s. The flow (expressed in vehicles/hr) in this traffic stream is ________
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
trafficengineering
transportationengineering
trafficstream
0
votes
0
answers
18
GATE2016153
A two lane, oneway road with radius of $50$ m is predominantly carrying lorries with wheelbase of $5$ m. The speed of lorries is restricted to be between $60$ kmph and $80$ kmph. The mechanical widening and psychological widening required at $60$ kmph are designated as $w_{me,60}$ and $w_{ps,60}$, ... $1.19 \:m, 0.50 \:m, 0.89 \:m, \text{ and } 0.50 \:m$
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce1
trafficengineering
transportationengineering
speed
mechanicalandpsychologicalwidening
0
votes
0
answers
19
GATE2016154
While traveling along and against the traffic stream, a moving observer measured the relative flows as $50$ vehicles/hr and $200$ vehicles/hr, respectively. The average speeds of the moving observer while traveling along and against the stream are $20$ km/hr and $30$ km/hr, respectively. The density of the traffic stream (expressed in vehicles/km) is _________
asked
Mar 28, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
trafficengineering
transportationengineering
densityoftrafficstream
0
votes
0
answers
20
GATE2017 CE1: 25
Vehicles arriving at an intersection from one of the approach roads follow the Poisson distribution. The mean rate of arrival is $900$ vehicles per hour. If a gap is defined as the time difference between two successive vehicle arrivals (with vehicles assumed to be points), the probability (up to four decimal places) that the gap is greater than $8$ seconds is ___________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2017ce1
numericalanswers
trafficengineering
transportationengineering
poissondistribution
0
votes
0
answers
21
GATE2017 CE1: 33
The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of $96$ seconds is shown in the figure (not drawn to scale) At time $t=0$, the light has just turned red. The ... delay per vehicle $=45$ seconds $s=1200$ vph, and for this cycle, the average stopped delay per vehicle $=28.125$ seconds
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2017ce1
trafficengineering
transportationengineering
traveltimedelay
0
votes
0
answers
22
GATE2017 CE1: 34
The radius of a horizontal circular curve on a highway is $120$ m. The design speed is $60$ km/hour, and the design coefficient of lateral friction between the tyre and road surface is $0.15$. The estimated value of superrelevation required (if full lateral friction is assumed to develop), and the ... $\dfrac{1}{11.6} \text{ and } 0.24 \\$ $\dfrac{1}{12.9} \text{ and } 0.24$
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2017ce1
trafficengineering
transportationengineering
speed
0
votes
0
answers
23
GATE2015223
The following statements are made related to the lengths of turning lanes at signalised intersections: $1.5$ times the average number of vehicles (by vehicle type) that would store in turning lane per cycle during the peak hour. $2$ times the average number of vehicles (by vehicle type) ... lanes is: Maximum of (ii) and (iii) Maximum of (i) and (iii) Average of (i) and (iii) Only (iv)
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2015ce2
trafficengineering
transportationengineering
signaldesign
typesofintersections
0
votes
0
answers
24
GATE2015251
The relation between speed $u$ (in km/h) and density $k$ (number of vehicles/km) for a traffic stream on a road is $u=700.7k$. The capacity on this road is _________ vph (vehicles/hour).
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2015ce2
numericalanswers
trafficengineering
transportationengineering
trafficstream
0
votes
0
answers
25
GATE2015123
Which of the following statements CANNOT be used to describe free flow speed $(u_f)$ of a traffic stream? $(u_f)$ is the speed when flow is negligible $(u_f)$ is the speed when density is negligible $(u_f)$ is affected by geometry and surface conditions of the road $(u_f)$ is the speed at which flow is maximum and density is optimum
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2015ce1
trafficengineering
transportationengineering
trafficstream
0
votes
0
answers
26
GATE2015151
The accelerationtime relationship for a vehicle subjected to nonuniform acceleration is, $\dfrac{dv}{dt} = (\alpha\:  \beta v_0) e^{  \beta t}$ where, $v$ is the speed in m/s, $t$ is the time in s, $\alpha$ and $\beta$ are parameters, and $v_0$ is the initial speed ... $\dfrac{dv}{dt}=1.3 m/s^2$ at $t=3$s, the distance (in m) travelled by the vehicle in $35$ s is ________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2015ce1
numericalanswers
trafficengineering
transportationengineering
speed
accelerationtimerelationship
0
votes
0
answers
27
GATE2014253
A pretimed four phase signal has critical lane flow rate for the first three phases as $200$, $187$ and $210$ veh/hr with saturation flow rate of $1800$ veh/hr/lane for al phases. The lost time is given as $4$ seconds for each phase. If the cycle length is $60$ seconds, the effective green time (in seconds) of the fourth phase is ________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce2
numericalanswers
trafficengineering
transportationengineering
signaldesign
0
votes
0
answers
28
GATE2014255
The chainage of the intersection point of two straight is $1585.60$ m and the angle of intersection is $140^{\circ}$. If the radius of a circular curve is $600.00$ m, the tangent distance (in m) and length of the curve (in m), respectively are $418.88$ and $1466.08$ $218.38$ and $1648.49$ $218.38$ and $418.88$ $418.88$ and $218.38$
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce2
trafficengineering
transportationengineering
typesofintersections
0
votes
0
answers
29
GATE2014223
The average spacing between vehicles in a traffic stream is $50$ m, then the density (in veh/km) of the stream is _______
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce2
numericalanswers
trafficengineering
transportationengineering
trafficstream
0
votes
0
answers
30
GATE2014153
An isolated threephase traffic signal is designed by Webster’s method. The critical flow ratios for three phases are $0.20$, $0.30$, and $0.25$ respectively, and lost time per phase is $4$ seconds. The optimum cycle length (in seconds) is ____________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce1
numericalanswers
trafficengineering
transportationengineering
webster'smethod
0
votes
0
answers
31
GATE2014152
The speeddensity $(uk)$ relationship on a single lane road with unidirectional flow is $u=700.77k$, where $u$ is in km/hr and $k$ is in veh/km. The capacity of the road (in veh/hr) is ___________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce1
numericalanswers
trafficengineering
transportationengineering
speeddensityrelationship
0
votes
0
answers
32
GATE2014129
A traffic office imposes on an average $5$ number of penalties daily on traffic violators. Assume that the number of penalties on different days is independent and follows a Poisson distribution. The probability that there will be less than $4$ penalties in a day is ___________
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce1
numericalanswers
trafficengineering
transportationengineering
probability
poissondistribution
0
votes
0
answers
33
GATE2014123
The minimum value of $15$ minute peak hour factor on a section of a road is $0.10$ $0.20$ $0.25$ $0.33$
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2014ce1
trafficengineering
transportationengineering
peakhourfactor
0
votes
0
answers
34
GATE Civil 2013  Question: 24
For two major roads with divided carriageway crossing at right angle, a full clover leaf interchange with four indirect ramps is provided. Following statements are made on turning movement of vehicles to all directions from both roads. Identify the ... left is not possible, but diverging to left is possible Neither merging from left nor diverging to left is possible
asked
Mar 26, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2013ce
trafficengineering
transportationengineering
0
votes
0
answers
35
GATE Civil 2012  Question: 46
A twolane urban road with oneway traffic has a maximum capacity of $1800$ vehicles/hour. Under the jam condition, the average length occupied by the vehicles is $5.0 \: m$. The speed versus density relationship is linear. For a traffic volume of $1000$ vehicles/hour, the density (in vehicles/km) is $52$ $58$ $67$ $75$
asked
Mar 25, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2012ce
trafficengineering
transportationengineering
trafficvolume
0
votes
0
answers
36
GATE Civil 2012  Question: 44
A pavement designer has arrived at a design traffic of $100$ million standard axles for a newly developing national highway as per $IRC:37$ guidelines using the following data: design life $=15$ years, commercial vehicle count before pavement construction $=4500$ vehicles/day, ... $1.53$ $2.24$ $3.66$ $4.14$
asked
Mar 25, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2012ce
trafficengineering
transportationengineering
trafficgrowthrate
0
votes
0
answers
37
GATE Civil 2012  Question: 24
Road roughness is measured using Benkelman beam Bump integrator Dynamic cone penetrometer Falling weight deflectometer
asked
Mar 25, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2012ce
trafficengineering
transportationengineering
urbanroads
0
votes
0
answers
38
GATE Civil 2012  Question: 22
Two major roads with two lanes each are crossing in an urban area to form an uncontrolled intersection. The number of conflict points when both roads are oneway is “X” and when both roads are twoway is “Y”. The ratio of X and Y is $0.25$ $0.33$ $0.50$ $0.75$
asked
Mar 25, 2018
in
Traffic Engineering
by
Milicevic3306
(
11.9k
points)
gate2012ce
trafficengineering
transportationengineering
urbanroads
–1
vote
3
answers
39
GATE2018 CE1: 34
A priority intersection has a singlelane oneway traffic road crossing an undivided twolane twoway traffic road. The traffic stream speed on the single lane road is $20$ kmph and the speed on the twolane road is $50$ kmph. The perceptionreaction time is $2.5$ s, coefficient of longitudinal ... be $50$ m and $20$ m $61$ m and $18$ m $111$ m and $15$ m $122$ m and $36$ m
answered
Feb 23, 2018
in
Traffic Engineering
by
goudarningu
(
360
points)
gate2018ce1
trafficengineering
transportationengineering
trafficstream
0
votes
1
answer
40
GATE2018 CE2: 54
A $7.5$ m wide twolane road on a plain terrain is to be laid along a horizontal curve of radius $510$ m. For a design speed of $100$ kmph, super elevation is provided as per $\text{IRC:}731980$. Consider acceleration due to gravity as $9.81 m/s^2$. The level difference between the inner and outer edges of the road (in m, upto three decimal places is ________
answered
Feb 19, 2018
in
Traffic Engineering
by
Rashut Ved
(
140
points)
gate2018ce2
numericalanswers
trafficengineering
transportationengineering
urbanroads
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