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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305577398
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Question
Chapter 6, Problem 22P
To determine
The phenomenon of gap acceptance with respect to merging and weaving maneuvers in traffic streams.
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Students have asked these similar questions
Traffic on a freeway gives a Greenshield's traffic flow relationship expressed as:
Q = 60k-0.16667k?
At 10AM, an accident occurs 4 km downstream of an access ramp. The vehicles pull onto the shoulder of
the roadway, but traffic passing the accident area slows to 10 kph as drivers survey the damage on the side
of the road. A patrol car enters the freeway via access ramp, also at 10AM. Upon entering the freeway, the
patrol car notes that traffic on the freeway is moving along at about 40 kph.
Determine the following:
1. Capacity flow of the highway
2. Traffic shockwave created by the road accident
3. Time in AM the patrol car will reach the accident zone
4. Plotted traffic shockwave line in the Q-k traffic model diagram
QUESTION 8
If the free flow speed of the highway is measured in the field, you apply adjustments for lane width, total lateral
clearance, type of median, and access density to estimate free flow speed.
O True
False
Based on a field traffic study, the flow-density
relationship for a minor arterial street was
found as Q= 44 D - 0.6 D2, then the density at
.traffic jam condition is about . Veh./km
34
.a
53
.b
73
111
.d
None
.e
C.
Chapter 6 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - The arrival times of vehicles at the ticket gate...Ch. 6 - Prob. 27P
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- A section of highway shows a linear relationship between speed and density during a peak hour. If the free flow speed is 70 mph, capacity is 4210 vehicles per mile. Determine the average vehicle spacing in feet when the density is 1/3 of the jam density. A. 45.75B. 104.10C. 93.25D. 65.80arrow_forward0-1 A section of highway having a length 60 m. The observed data are 6 vehicles cross over it in a period of 148 sec., for the following duration: 2.4, 2.8, 3.0, 2.1, 2.2. and 3.5 sec. Estimate the values of the flow rate, density, space-mean speed, time-mean speed, average gap, and average clearance. If the length of vehicles are 6, 5.4, 6.6, 4.8, 7.5, and 6 m respectively? 0-2 Traffic volume data has been collected for 10 min time intervals as shown below. Find the total hourly volume, flow rate and PHF. Time 7:30-7:40 7:40-7:50 7:50-8:00 8:00-8:10 8:10-8:20 8:20-8:30 Volume 250 280 300 200 150 130 0-3|| A vehicle takes 1.5 hr to travers a distance of 90 km between two cities. Calculate the journey speed and operational delay if you know that the running speed of this vehicle exceeds it journey speed by 10 km/hr ?arrow_forwardIn a given traffic data, determine the Q-k derived equation model using the Greenberg's Traffic flow model and show, draw the plotted modelled points within the curve in a Q-k diagram. Given Traffic Data: Speed in kph 11.5 49.8 15.2 31.3 77.6 Density in veh/km 125.5 93.2 41.8 36.6 39.6arrow_forward
- Nonearrow_forwardIn the typical curve of flow-density relationship, the traffic condition(s) where traffic :flow nearly zero occurs at Both (empty street & jam density) at capacity .b None .C empty street .d jam density .earrow_forwardAssume you are observing traffic in a single lane of McArthur Highway at a specific location. You measure the average headway and average spacing of the vehicles as 3.2sec. and 50 m. respectively. Determine the traffic flow in vehicle/hour.arrow_forward
- SOLVE ASAP AND SHOW A FULL SOLUTIONarrow_forwardBy assuming a linear speed-density relationship, the mean free speed on a highway facility lane equals 55 mph near zero density, and the jam density is observed to be about 170 veh/mi. Write down the speed-density and flow-density equations. Plot the q-v curves in proper order. Compute speeds and densities corresponding to a flow of 900 veh/hr, describing traffic conditions from a driver's point of view. Calculate average headways, gaps, clearance, and spacing at maximum flow and at jam density. Discuss all the results you obtain. Are they realistic?arrow_forwardB6arrow_forward
- How are interrupted flow and uninterrupted flow of traffic stream defined? With diagram explain the fundamental relationship of speed-flow-density of uninterrupted traffic flowarrow_forwardI need the answer quicklyarrow_forwardSHOW A FULL SOLUTIONA traffic signal operating at an intersection inside a mall with effective green and red times of 40 and 50 secs respectively. Vehicles arrive at the intersection at a rate of 700vph. The traffic stream model that will be used inside the mall is given such that u=70-0.71k (u is speed in kph and k is density in vpk/lane). Determine the following:a.) Jam Densityb.) Free-flowing speedc.) Maximum capacityd.) Flow at traffic state Ae.) Density at traffic state Af.) Flow at traffic state Bg.) Density at traffic state Bh.) Shockwave A-Bi.) What type of shockwave happened in State A-Bj.) Flow at traffic state Ck.) Density at traffic state Cl.) Shockwave B-Cm.)What type of shockwave happened in State B-Cn.) Max queue lengtho.) Queue reachp.) How long will it take for the queue to completely clear (secs)?arrow_forward
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