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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 $0$ $\frac{v_{f}}{4}$ $\frac{v_{f}}{2}$ $v_{f}$
go_editor
asked
in
Traffic Engineering
Mar 1, 2021
by
go_editor
5.3k
points
gatecivil-2021-set2
traffic-studios-on-flow-and-speed
0
votes
0
answers
2
GATE Civil 2021 Set 2 | Question: 24
In a three-phase signal system design for a four-leg 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 _______________
go_editor
asked
in
Traffic Engineering
Mar 1, 2021
by
go_editor
5.3k
points
gatecivil-2021-set2
numerical-answers
traffic-signal
design-by-websters-method
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 ______________
Arjun
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in
Traffic Engineering
Feb 20, 2021
by
Arjun
11.6k
points
gatecivil-2021-set1
numerical-answers
signal-design
websters-method
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 $u=70-0.7k$ (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 $0.5 \:s$ $1.0 \:s$ $1.6 \:s$ $2.1 \:s$
Arjun
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in
Traffic Engineering
Feb 20, 2021
by
Arjun
11.6k
points
gatecivil-2021-set1
traffic-studios-on-flow-and-speed
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 _______________________
Arjun
asked
in
Traffic Engineering
Feb 20, 2021
by
Arjun
11.6k
points
gatecivil-2021-set1
numerical-answers
statical-analysis-of-traffic-data
poisson-distribution
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 space-mean speed (in $\text{km/h}$, $\textit{round off to two decimal places}$) of the observed vehicles is ___________________
Arjun
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in
Traffic Engineering
Feb 20, 2021
by
Arjun
11.6k
points
gatecivil-2021-set1
numerical-answers
traffic-studios-on-flow-and-speed
0
votes
0
answers
7
GATE2020-CE-1-45
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 ______.
go_editor
asked
in
Traffic Engineering
Feb 28, 2020
by
go_editor
5.3k
points
gate2020-ce-1
numerical-answers
peak-hour-factor
traffic-flow
0
votes
0
answers
8
GATE2020 CE-2-9
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
go_editor
asked
in
Traffic Engineering
Feb 13, 2020
by
go_editor
5.3k
points
gate2020-ce-2
traffic-engineering
transportation-engineering
signal-design
0
votes
0
answers
9
GATE2020 CE-2-20
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 __________.
go_editor
asked
in
Traffic Engineering
Feb 13, 2020
by
go_editor
5.3k
points
gate2020-ce-2
numerical-answers
axle-load
traffic-engineering
transportation-engineering
0
votes
0
answers
10
GATE2020 CE-2-21
$24$-$h$ 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 __________.
go_editor
asked
in
Traffic Engineering
Feb 13, 2020
by
go_editor
5.3k
points
gate2020-ce-2
numerical-answers
static-analysis-of-traffic-data
0
votes
0
answers
11
GATE2017 CE-2-12
The safety within a roundabout and the efficiency of a roundabout can be increased, respectively, by increasing the entry radius and increasing the exit radius increasing the entry radius and decreasing the exit radius decreasing the entry radius and increasing the exit radius decreasing the entry radius and decreasing the exit radius
gatecse
asked
in
Traffic Engineering
Aug 7, 2019
by
gatecse
4.0k
points
gate2017-ce-2
transportation-engineering
traffic-engineering
traffic-control
0
votes
0
answers
12
GATE2017 CE-2-36
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
gatecse
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in
Traffic Engineering
Aug 7, 2019
by
gatecse
4.0k
points
gate2017-ce-2
traffic-engineering
transportation-engineering
traffic-studios-on-flow-and-speed
0
votes
0
answers
13
GATE2019 CE-1: 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 _______
Arjun
asked
in
Traffic Engineering
Feb 14, 2019
by
Arjun
11.6k
points
gate2019-ce-1
numerical-answers
traffic-engineering
transportation-engineering
peak-hour-factor
0
votes
0
answers
14
GATE2019 CE-1: 45
Average free flow speed and the jam density observed on a road stretch are $60 \: km/h$ and $120$ vehicles/km, respectively. For a linear speed-density relationship, the maximum flow on the road stretch (in vehicles/h) is _______
Arjun
asked
in
Traffic Engineering
Feb 14, 2019
by
Arjun
11.6k
points
gate2019-ce-1
numerical-answers
transportation-engineering
traffic-engineering
traffic-studios-on-flow-and-speed
0
votes
0
answers
15
GATE2019 CE-1: 46
Traffic on a highway is moving at a rate of $360$ vehicles per hour at a location. If the number of vehicles arriving on this highway follows Poisson distribution, the probability (round off to $2$ decimal places) that the headway between successive vehicles lies between $6$ and $10$ seconds is ________
Arjun
asked
in
Traffic Engineering
Feb 14, 2019
by
Arjun
11.6k
points
gate2019-ce-1
numerical-answers
transportation-engineering
traffic-engineering
statistical-analysis-of-traffic-data
0
votes
0
answers
16
GATE2019 CE-2: 19
The speed-density relationship in a mid-block section of a highway follows the Greenshield’s model. If the free flow speed is $v_f$ and the jam density is $k_j$, the maximum flow observed on this section is $v_fk_j \\$ $\dfrac{v_fk_j}{2} \\$ $\dfrac{v_fk_j}{4} \\$ $\dfrac{v_fk_j}{8}$
Arjun
asked
in
Traffic Engineering
Feb 12, 2019
by
Arjun
11.6k
points
gate2019-ce-2
transportation-engineering
traffic-engineering
traffic-studios-on-flow-and-speed
greenshieldss-model
0
votes
0
answers
17
GATE2019 CE-2: 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 __________
Arjun
asked
in
Traffic Engineering
Feb 12, 2019
by
Arjun
11.6k
points
gate2019-ce-2
numerical-answers
traffic-engineering
transportation-engineering
traffic-studios-on-flow-and-speed
0
votes
0
answers
18
GATE2016-2-22
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 $15$ $20$ $25$ $30$
Milicevic3306
asked
in
Traffic Engineering
Mar 28, 2018
by
Milicevic3306
11.9k
points
gate2016-ce-2
traffic-engineering
transportation-engineering
axle-load
surveys
statical-analysis-of-traffic-data
0
votes
0
answers
19
GATE2016-2-53
The critical flow ratios for a three-phase 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 $25$
Milicevic3306
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in
Traffic Engineering
Mar 28, 2018
by
Milicevic3306
11.9k
points
gate2016-ce-2
traffic-engineering
transportation-engineering
signal-design
0
votes
0
answers
20
GATE2016-2-54
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 __________
Milicevic3306
asked
in
Traffic Engineering
Mar 28, 2018
by
Milicevic3306
11.9k
points
gate2016-ce-2
numerical-answers
traffic-engineering
transportation-engineering
speed
0
votes
0
answers
21
GATE2016-1-22
In a one-lane one-way homogeneous traffic stream, the observed average headway is $3.0$ s. The flow (expressed in vehicles/hr) in this traffic stream is ________
Milicevic3306
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in
Traffic Engineering
Mar 28, 2018
by
Milicevic3306
11.9k
points
gate2016-ce-1
numerical-answers
traffic-engineering
transportation-engineering
traffic-stream
0
votes
0
answers
22
GATE2016-1-54
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 _________
Milicevic3306
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in
Traffic Engineering
Mar 28, 2018
by
Milicevic3306
11.9k
points
gate2016-ce-1
numerical-answers
traffic-engineering
transportation-engineering
density-of-traffic-stream
traffic-studios-on-flow-and-speed
0
votes
0
answers
23
GATE2017 CE-1: 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 ___________
Milicevic3306
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2017-ce-1
numerical-answers
traffic-engineering
transportation-engineering
poisson-distribution
0
votes
0
answers
24
GATE2017 CE-1: 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
Milicevic3306
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2017-ce-1
traffic-engineering
transportation-engineering
travel-time-delay
statical-analysis-of-traffic-data
0
votes
0
answers
25
GATE2017 CE-1: 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 ... $\dfrac{1}{11.6} \text{ and } 0.24 \\$ $\dfrac{1}{12.9} \text{ and } 0.24$
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2017-ce-1
traffic-engineering
transportation-engineering
traffic-studios-on-flow-and-speed
0
votes
0
answers
26
GATE2015-2-22
A superspeedway in New Delhi has among the highest super-elevation rates of any track on the Indian Grand Prix circuit. The track requires drivers to negotiate turns with a radius of $335$ m and $33^{\circ}$ banking. Given this information, the coefficient of side friction required in order to allow a vehicle to travel at $320$ km/h along the curve is $1.761$ $0.176$ $0.253$ $2.530$
Milicevic3306
asked
in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-2
traffic-engineering
transportation-engineering
statistical-analysis-of-traffic-data
0
votes
0
answers
27
GATE2015-2-23
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)
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-2
traffic-engineering
transportation-engineering
signal-design
types-of-intersections
0
votes
0
answers
28
GATE2015-2-51
The relation between speed $u$ (in km/h) and density $k$ (number of vehicles/km) for a traffic stream on a road is $u=70-0.7k$. The capacity on this road is _________ vph (vehicles/hour).
Milicevic3306
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-2
numerical-answers
traffic-engineering
transportation-engineering
traffic-stream
0
votes
0
answers
29
GATE2015-1-23
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
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
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gate2015-ce-1
traffic-engineering
transportation-engineering
traffic-stream
0
votes
0
answers
30
GATE2015-1-51
The acceleration-time relationship for a vehicle subjected to non-uniform 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 ________
Milicevic3306
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-1
numerical-answers
traffic-engineering
transportation-engineering
speed
acceleration-time-relationship
0
votes
0
answers
31
GATE2015-1-52
On a circular curve, the rate of superelevation is $e$. While negotiating the curve a vehicle comes to a stop. It is seen that the stopped vehicle does not slide inwards (in the radial direction). The coefficient of side friction is $f$. Which of the following is true: $e \leq f$ $f < e < 2f$ $e \geq 2f$ none of the above
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-1
transportation-engineering
traffic-engineering
accident-study
0
votes
0
answers
32
GATE2015-1-53
A sign is required to be put up asking drivers to slow down to $30$ km/h before entering Zone $Y$ (see figure). On this road, vehicles require $174$ m to slow down to $30$ km/h (the distance of $174$ m includes the distance travelled during the perception- ... even a $6/9$ vision driver can slow down to $30$ km/h before entering the zone. The minimum value of $x$ is ________ m.
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2015-ce-1
numerical-answers
transportation-engineering
traffic-engineering
traffic-signs
0
votes
0
answers
33
GATE2014-2-55
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 $218.38$
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
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gate2014-ce-2
traffic-engineering
transportation-engineering
types-of-intersections
0
votes
0
answers
34
GATE2014-2-53
A pre-timed 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 ________
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
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gate2014-ce-2
numerical-answers
traffic-engineering
transportation-engineering
signal-design
0
votes
0
answers
35
GATE2014-2-51
A student riding a bicycle on a $5$ km one-way street takes $40$ minutes to reach home. The student stopped for $15$ minutes during this ride. $60$ vehicles overtook the student (assume the number of vehicles overtaken by the student is zero) during the ride and $45$ vehicles while the student stopped. The speed of vehicle stream on that road (in km/hr) is $7.5$ $12$ $40$ $60$
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2014-ce-2
transportation-engineering
traffic-engineering
traffic-studios-on-flow-and-speed
0
votes
0
answers
36
GATE2014-2-23
The average spacing between vehicles in a traffic stream is $50$ m, then the density (in veh/km) of the stream is _______
Milicevic3306
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in
Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2014-ce-2
numerical-answers
traffic-engineering
transportation-engineering
traffic-stream
0
votes
0
answers
37
GATE2014-1-50
A traffic survey conducted on a road yields an average daily traffic count of $5000$ ... the vehicle damage factor (VDF) is calculated from the above data, the design traffic (in million standard axle load, MSA) is ________
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2014-ce-1
numerical-answers
traffic-engineering
transportation-engineering
statical-analysis-of-traffic-data
0
votes
0
answers
38
GATE2014-1-52
The speed-density $(u-k)$ relationship on a single lane road with unidirectional flow is $u=70-0.77k$, where $u$ is in km/hr and $k$ is in veh/km. The capacity of the road (in veh/hr) is ___________
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2014-ce-1
numerical-answers
traffic-engineering
transportation-engineering
speed-density-relationship
0
votes
0
answers
39
GATE2014-1-53
An isolated three-phase 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 ____________
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Traffic Engineering
Mar 26, 2018
by
Milicevic3306
11.9k
points
gate2014-ce-1
numerical-answers
traffic-engineering
transportation-engineering
webster's-method
0
votes
0
answers
40
GATE2014-1-29
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 ___________
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Traffic Engineering
Mar 26, 2018
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Milicevic3306
11.9k
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gate2014-ce-1
numerical-answers
traffic-engineering
transportation-engineering
probability
poisson-distribution
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