Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Chapter 3, Problem 23P
To determine
The minimum distance required for the road sign should be located from the diversion.
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The pumping system shown below is supposed to provide at least 250 GPM of water to the
drinking trough. The outlet of the drawn tubing at the drinking water trough discharges to the
atmosphere as a water jet. The outlet of the pipe is approximately 12 ft higher than the water
surface of reservoir. Expected water temperature is 70ᵒF. Your objective is to select a pump
and check its performance for the specified system. Your tasks include:
1. Determine total dynamic head (TDH) operating against the pump for the design flow rate.
Neglect minor losses. Note that H-W is not appropriate for this water temperature, and you
need to use D-W.
2. Use the TDH and Qdesign to approach a pump vendor. She provides you the attached four
pump performance curves for your consideration.
3. Select the appropriate pump based on the fit of the selection point on the pump
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4. Develop the system curve.
5. Determine the pump operating point and record the system operating conditions…
$$ 5.1 Assume that 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 165 ft, respectively.
Calculate the flow, average speed, and density of the
traffic stream in this lane.
5.2 Assume that you are an observer standing at a
point along a three-lane roadway. All vehicles in lane
1 are traveling at 30 mi/h, all vehicles in lane 2 are
traveling at 45 mi/h, and all vehicles in lane 3 are
traveling at 60 mi/h. There is also a constant spacing
of 0.5 mile between vehicles. If you collect spot speed
data for all vehicles as they cross your observation
point, for 30 minutes, what will be the time-mean
speed and space-mean speed for this traffic stream?
Determine the direction of F2 such that the resultant force of adding F1 and F2 acts along the positive yaxis.
Chapter 3 Solutions
Traffic And Highway Engineering
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