5. Consider the time-space diagram below. a. If you are observing from a point at distance-1000 ft, what is the average headway between each vehicle? Distance (ft) b. What is the average density between 0 and 1000 ft at a time of 10 s? c. What is the speed of vehicle 1 (the top vehicle)? d. What is likely happening at a distance of 1500 ft? 3500 3000 2500 2000 1500 1000 500 0 10 Time-Space Diagram for Hobart St 30 Time (s) -Veh 1-Veh 2 -Veh 3-Veh 4 20 40 50

5. Consider the time-space diagram below. a. If you are observing from a point at distance-1000 ft, what is the average headway between each vehicle? Distance (ft) b. What is the average density between 0 and 1000 ft at a time of 10 s? c. What is the speed of vehicle 1 (the top vehicle)? d. What is likely happening at a distance of 1500 ft? 3500 3000 2500 2000 1500 1000 500 0 10 Time-Space Diagram for Hobart St 30 Time (s) -Veh 1-Veh 2 -Veh 3-Veh 4 20 40 50

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

5. Consider the time-space diagram below.
a. If you are observing from a point at distance-1000 ft, what is the average headway between
each vehicle?
Distance (ft)
b.
What is the average density between 0 and 1000 ft at a time of 10 s?
c. What is the speed of vehicle 1 (the top vehicle)?
d. What is likely happening at a distance of 1500 ft?
3500
3000
2500
2000
1500
1000
500
0
10
Time-Space Diagram for Hobart St
20
30
Time (s)
-Veh 1-Veh 2 -Veh 3-Veh4
40
50

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QUESTION 1 A researcher was observing traffic along one lane of a rural highway. During a 1 minute time interval, ten vehicles were observed travelling 65, 64, 71, 66, 58, 72, 69, 66, 55 and 62 mph. Using these spot speeds, calculate the space mean speed (mph). Provide your answer to the nearest tenth of a mph.
We know that q=ku for traffic flow. If we measure speeds and densities at three points within a mile at the same time, which of the following is true? a. Average u will be the same at all three points b. Average k will be the same at all three points c. Average q (calculated) will be the same at all three points d. None of the above 6. 7. Headway is defined as the time between vehicles passing a fixed point on the road, measured from: a. Front bumper of first car to back bumper of second car b. Front bumper of first car to front bumper of second car c. Back bumper of first car to front bumper of second car d. None of the above
Answer question 8
A researcher was observing traffic along one lane of a rural highway. During a 1 minute time interval, ten vehicles were observed travelling 65, 64, 71, 66, 58, 72, 69, 66, 55 and 62 mph. Using these spot speeds, calculate the time mean speed (mph). Provide your answer to the nearest tenth of a mph.
Match the following to True/False. A. GPS devices are an example of mobile traffic sensors For the time-space diagram of a single-lane one-way road, the vehicle trajectories do not intersect with each other unless there is a crash. Pneumatic tubes detect vehicle presence by sending an electric signal to a roadside device. B. Space mean speed may be greater than time mean speed in certain situations. A. True B. False
4. The relation of the density (d) along a roadway to vehicle speed (s: km/h) is given as d = 50- s/2 Determine the flow (q)-speed (s) and flow (q)-density (d) relationships and draw the variations of density-speed, flow-speed and flow-density on. Show the maximum and minimum points on these graphs
Q4 / The data from moving observer methods as shown in the table. Column 1 gives the sample number, column 2 gives the number of vehicles moving against the stream, column 3 gives the number of vehicles that had overtaken the test vehicle, and last column gives the number of vehicles overtaken by the test vehicle. Find the flowrate, density and mean speed. Also, plot the fundamental diagrams of traffic flow. 2 3 4 No. Sample 1 107 10 74 113 25 41 3 30 15 4 79 18 9.
Please show me process and step I want to understand
Assume you are observing traffic in a single lane of a highway at a specific location. You measure the average headway and average spacing of passing vehicles as 3.2 seconds and 20 m, respectively. Calculate the flow, average speed, and density of the traffic stream in this lane.
A researcher was observing traffic along one lane of a rural highway. During a 1 minute time interval, ten vehicles were observed travelling 65, 64, 71, 66, 58, 72, 69, 66, 55 and 62 mph. Estimate the average vehicle spacing (ft/veh). Provide your answer to the nearest integer.
Perception reaction time t ??
Transportation and communications engineering