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Traffic-engineering Questions Set 8:

Quiz Mode

If the designs 80 kmph perception reaction time 3 second and coefficient of friction 0.5 the safe stopping side distance in m is

126

124

117.11

127.87

Solution:

These islands are used to guide the traffic into the proper channel through the intersection area.

Divisional Island

Channelizing Island

Pedestrian Island

Rotary Island

Solution:

The coefficient of friction in the longitudinal direction of a highway is estimated as 0.396. The braking distance for a car moving at a speed of 65 kmph is

Solution:

The speed-density relationship of a highway is given as u= 100-0.5 k where, u = speed in km per hour, k = density in vehicles per km. The maximum flow (in vehicles per hour, round off to the nearest integer) is

4000

5000

6000

7000

Solution:

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

2000

1400

1800

1900

Solution:

An isolated 3-phase traffic signal is designed by Webster’s method. The critical flow ratios for 3 phases are 0.20, 0.30, and 0.25 respectively, and lost time per phase is 4 seconds. The optimum cycle length (in integer, in seconds) is ______.

Solution:

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

Saturation headway

Effective headway

Intersection headway

Discharge headway

Solution:

The space mean speed (kmph) and density (vehicles/km) of a traffic stream are linearly related. The free flow speed and jam density are 80 kmph and 100 vehicles/km respectively. The traffic flow (in vehicles/h, up to one decimal place) corresponding to a speed of 40 kmph is _______.

Solution:

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

0.12

0.18

0.14

0.20

Solution:

If the normal flows on two approach roads at an intersection are 600 PCU per hour and 400 PCU per hour, the saturation flows are 1500 PCU per hour on each road, and the lost time per signal cycle is 16 seconds, then the optimum cycle time calculated using the Webster method is:

72.5 seconds

58 seconds

85.29 seconds

19.3 seconds

Traffic-engineering Questions Set 8:

If the designs 80 kmph perception reaction time 3 second and coefficient of friction 0.5 the safe stopping side distance in m is

Solution:

These islands are used to guide the traffic into the proper channel through the intersection area.

Solution:

The coefficient of friction in the longitudinal direction of a highway is estimated as 0.396. The braking distance for a car moving at a speed of 65 kmph is

Solution:

The speed-density relationship of a highway is given as u= 100-0.5 k where, u = speed in km per hour, k = density in vehicles per km. The maximum flow (in vehicles per hour, round off to the nearest integer) is

Solution:

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

Solution:

An isolated 3-phase traffic signal is designed by Webster’s method. The critical flow ratios for 3 phases are 0.20, 0.30, and 0.25 respectively, and lost time per phase is 4 seconds. The optimum cycle length (in integer, in seconds) is ______.

Solution:

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

Solution:

The space mean speed (kmph) and density (vehicles/km) of a traffic stream are linearly related. The free flow speed and jam density are 80 kmph and 100 vehicles/km respectively. The traffic flow (in vehicles/h, up to one decimal place) corresponding to a speed of 40 kmph is _______.

Solution:

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

Solution:

If the normal flows on two approach roads at an intersection are 600 PCU per hour and 400 PCU per hour, the saturation flows are 1500 PCU per hour on each road, and the lost time per signal cycle is 16 seconds, then the optimum cycle time calculated using the Webster method is:

Solution:

Related Question Sets:

Related Topics:

Traffic-engineering Questions Set 8:

If the designs 80 kmph perception reaction time 3 second and coefficient of friction 0.5 the safe stopping side distance in m is

Solution:

These islands are used to guide the traffic into the proper channel through the intersection area.

Solution:

The coefficient of friction in the longitudinal direction of a highway is estimated as 0.396. The braking distance for a car moving at a speed of 65 kmph is

Solution:

The speed-density relationship of a highway is given as u= 100-0.5 k where, u = speed in km per hour, k = density in vehicles per km. The maximum flow (in vehicles per hour, round off to the nearest integer) is

Solution:

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

Solution:

An isolated 3-phase traffic signal is designed by Webster’s method. The critical flow ratios for 3 phases are 0.20, 0.30, and 0.25 respectively, and lost time per phase is 4 seconds. The optimum cycle length (in integer, in seconds) is ______.

Solution:

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 isreferred to as

Solution:

The space mean speed (kmph) and density (vehicles/km) of a traffic stream are linearly related. The free flow speed and jam density are 80 kmph and 100 vehicles/km respectively. The traffic flow (in vehicles/h, up to one decimal place) corresponding to a speed of 40 kmph is _______.﻿

Solution:

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

Solution:

If the normal flows on two approach roads at an intersection are 600 PCU per hour and 400 PCU per hour, the saturation flows are 1500 PCU per hour on each road, and the lost time per signal cycle is 16 seconds, then the optimum cycle time calculated using the Webster method is:

Solution:

Related Question Sets:

Related Topics:

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

The space mean speed (kmph) and density (vehicles/km) of a traffic stream are linearly related. The free flow speed and jam density are 80 kmph and 100 vehicles/km respectively. The traffic flow (in vehicles/h, up to one decimal place) corresponding to a speed of 40 kmph is _______.