2. Figure shows the captured aerial photography showing the locations and speeds of 4 vehicles travelling between section x & y. An observer located at X observes the four(4) vehicles passing pt X during a period of 15 sec. Calculate the following: a) Space Mean Speed b) Time Mean Speed c) Average Spacing d) Headway 60 kph 40 kph 45 kph 55 kph Direction A of flow

2. Figure shows the captured aerial photography showing the locations and speeds of 4 vehicles travelling between section x & y. An observer located at X observes the four(4) vehicles passing pt X during a period of 15 sec. Calculate the following: a) Space Mean Speed b) Time Mean Speed c) Average Spacing d) Headway 60 kph 40 kph 45 kph 55 kph Direction A of flow

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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solve the problem given in image. please solve it completely.
On a six-lane EDSA, an observer is stationed at a certain spot. All of the cars in lane 1 are moving at a speed of 80 kph, 75 kph in lane 2, and 90 kph in lane 3,66 kph in lane 4,70 in lane 5, 65 in lane 6 and 85 for the bus lane respectively. In addition, cars are kept at a constant 65-meter distance between. What will be the time-mean speed and space-mean speed for such a traffic stream based on the acquired spot speed data for all cars as they cross the observation site for 60 minutes?
P Flag question The following field data were collected on a two-way road using the moving vehicle method. The vph. (MN = 120, Ms = 110, ON = 7, PN= 8, TN = 0.042 hr., Ts = traffic volume northbound (qn) is 0.048 hr.). а. none b. 1211 C. 1312 d. 910 е. 1566
Problem 3 (30%) Problem 11-1 in Roess, Prassas, McShane, 5th ed. (edited - omit part f) Consider the spot speed data below, collected at a rural highway site under conditions of uncongested flow: Speed Group (mi/h) Number of Vehicles Observed (N) 15-20 0 20-25 4 25-30 9 30-35 18 35-40 35 40-45 42 45-50 32 50-55 20 55-60 9 60-65 0 a. Plot the frequency and cumulative frequency curves for this data. b. Determine the median speed, the modal speed, the pace, and the percentage of vehicles in the pace from the curves and show how each was found. c. Compute the mean and standard deviation of the speed distribution. d. What are the confidence bounds of the estimate of the true mean speed of the distribution with 95% confidence? With 99.7% confidence? e. Based on the results of this study, a second study is to be conducted to achieve a tolerance of ±0.8 mi/h with 95% confidence. What sample size is required?
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Observers stationed at two sections XX and YY, 1000 ft apart on a highway, record the arrival times of four vehicles as shown in the table below. Vehicle Section XX Section YY A T0 T0 + 14.33 sec B T0 + 3.76 sec T0 + 18.14 sec C T0 + 7.94 sec T0 + 22.06 sec D T0 + 12.13 sec T0 + 27.87 sec If the total time of observation at XX was 20 sec, determine (a) the time mean speed, (b) the space mean speed, (c) the flow at section XX, and (d) the density on the highway
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