Homework 7 - CEE 122 Traffic Engineering Spring 2010...

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CEE 122 Traffic Engineering Spring 2010 Homework #7 Due: __________________ 1. Plot a time-space diagram using following observation. Distance Time 0 1 2 3 4 5 6 7 8 9 Car 1 80.0 177 262.9 337.6 401 453.3 494.4 524.3 542.9 550.4 Car 2 0 102.7 205.3 306.2 394.2 467.1 525.4 568.8 597.5 611.4 2. Given the following time-space diagram with the origin at D=0. Time - Space Diagram 0 500 1000 1500 0 50 100 150 200 Time (seconds) Distance (feet) 1 2 3 4 5 6
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a) Spot speeds are taken between T=50 and T=200 at an observer point 500 feet downstream of origin (D=500). Calculate the time mean speed and the space mean speed of observed vehicles. b) Between which two vehicles can the maximum spacing be found in the entire diagram? What is the maximum spacing? c) Between which two vehicles can the maximum headway be seen in the entire diagram? What is the maximum headway? d) Calculate the travel time, the running time, the travel speed, and the running speed of vehicle #5 between the origin and the observation point? e) What are the spacing and density on the segment between D=0 and D=500 at t= 50 second? Assume there is only 1 traffic lane. f)
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Homework 7 - CEE 122 Traffic Engineering Spring 2010...

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