Q5. A study of freeway flow at a particular site has resulted in calibrated speed-density relationship...
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Q5. A study of freeway flow at a particular site has resulted in calibrated speed-density relationship as: S = 58.0(1.0-0.008D), where S and D are traffic speed in mi/h and traffic density in veh/mi/In. For the relationship. determine: Free-flow speed; (2) Jam density; The speed-flow relationship; (4) The flow-density relationship; and Capacity. Q6. Data obtained from aerial photography showed six vehicles on a 600 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 4 sec. Determine (a) the density on the highway, (b) the flow on the road, and (c) the space mean speed. Q7. Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1500 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were 50, 45, 40, 35, and 30 mi/h, respectively, draw a schematic showing the locations of the vehicles 20 sec after the first vehicle passed section xx. Also determine (a) the time means peed, (b) the space mean speed, and (c) the density on the highway. Q8. The data shown below were obtained on a highway. Use regression analysis to fit these data to the Greenshields model and determine (a) the mean free speed, (b) the jam density, (c) the capacity, and (d) the speed at maximum flow. Density (veh/mi) Speed (mi/h) 14.2 85 24.1 70 30.3 55 40.1 41 50.6 20 55.0 15 Q5. A study of freeway flow at a particular site has resulted in calibrated speed-density relationship as: S = 58.0(1.0-0.008D), where S and D are traffic speed in mi/h and traffic density in veh/mi/In. For the relationship. determine: Free-flow speed; (2) Jam density; The speed-flow relationship; (4) The flow-density relationship; and Capacity. Q6. Data obtained from aerial photography showed six vehicles on a 600 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 4 sec. Determine (a) the density on the highway, (b) the flow on the road, and (c) the space mean speed. Q7. Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1500 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were 50, 45, 40, 35, and 30 mi/h, respectively, draw a schematic showing the locations of the vehicles 20 sec after the first vehicle passed section xx. Also determine (a) the time means peed, (b) the space mean speed, and (c) the density on the highway. Q8. The data shown below were obtained on a highway. Use regression analysis to fit these data to the Greenshields model and determine (a) the mean free speed, (b) the jam density, (c) the capacity, and (d) the speed at maximum flow. Density (veh/mi) Speed (mi/h) 14.2 85 24.1 70 30.3 55 40.1 41 50.6 20 55.0 15
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Heres the Python code to solve the given traffic engineering problems import numpy as npimport matplotlibpyplot as plt Q5def q5 Freeflow speed S 581 0... View the full answer
Related Book For
Essentials of Business Analytics
ISBN: 978-1285187273
1st edition
Authors: Jeffrey Camm, James Cochran, Michael Fry, Jeffrey Ohlmann, David Anderson, Dennis Sweeney, Thomas Williams
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