PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Question
Chapter 7, Problem 55P
To determine
The traffic volume that can be added to the southbound approach before
The added volume of Southbound approach is
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Students have asked these similar questions
A new freeway ramp meter will be
installed on the Medina onramp to
westbound SR 520. There is 70 ft
from the ramp meter stop line back
to the nearest intersection, and
each stopped vehicle takes up an
average of 20 ft. The desired meter
rate is one vehicle every 10 seconds,
while the arrival rate averages one
vehicle arrival every 11 seconds.
What is the average queue length?
55ft
O 4.5 ft
100ft
90ft
Determine minimum cycle length and LOS of North bound approach for
the intersection shown below. Given, Phase l: All EB movements; Phase
I1: All WB movements; and Phase IlI: All NB movements. Traffic volumes
given in figure are in veh/hr. Assume saturation flow rates as follows,
EBT/R 1590 veh/hr, WBL- 1580 veh/hr, WBT 1670 veh/hr, NBR -
1660 veh/hr and NBL - 1580 veh/hr. The intersection is isolated and
pre-timed. Use lost time per phase as 5 seconds. Use appropriate
recommendations where ever needed.
300
Eir
36 ft
330
285
LT RI
305
250
110
PHF 0.90
Target v/e ratio 0.90
Moderate pedestrian activity
(in xwalks only)
Speed limit 30 mi/h
(all approaches)
Crosswalk width
15 ft
24 ft24 ft
10 ft
3. An intersection approach has two lane groups: left-turn lane group, and through/right-turn lane
group. The control delay is 37 seconds/vehicle for the left-turn lane group, and 27
seconds/vehicle for the through/right-turn lane group. The analysis flow rate is 97
vehicles/hour for the left-turn lane group, and 450 vehicles/hour for the through/right-turn lane
group. Calculate the approach control delay and write the corresponding level of service (LOS)
for the approach in the box below.
Chapter 7 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10P
Ch. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28PCh. 7 - Prob. 29PCh. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Prob. 32PCh. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - Prob. 47PCh. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Prob. 50PCh. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - Prob. 53PCh. 7 - Prob. 54PCh. 7 - Prob. 55PCh. 7 - Prob. 56PCh. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - Prob. 60PCh. 7 - Prob. 61PCh. 7 - Prob. 62P
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Similar questions
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- Q3- A minor road carrying 100 veh/h on each approach for 8 hours of an average day crosses a major road carrying 260 veh/h on each approach for the same 8 hours, forming a cross intersection. The 85th-percentile approach speed of major roads is 35 kph. In addition, the multiway stop is considered as an interim solution. Determine whether a multiway stop sign is justified at this location if the following conditions exist: 1. The pedestrian volume from the minor street for the same 8 hours traffic volume is 110 ped/h. 2. The average delay to minor-street vehicular traffic during the maximum hours is 40 sec/veh. 3. There is an average of 18 crashes for the last 3-years that may be corrected by installing a multiway stop control.arrow_forwardPlease calculate the level of service and delay for the westbound left lane group, the westbound approach, and the whole intersection. I provided LOS chart for reference.arrow_forward5-10. The following travel times were measured for vehicles traversing a 1,000-ft segment of an arterial: Vehicle Travel Time (s) 20.6 2. 21.7 1 3 19.8 4 20.3 5 22.5 6 18.5 7 19.0 8 21.4 Determine the time mean speed (TMS) and space mean speed (SMS) for these vehicles.arrow_forward
- An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below. (1) Calculate the sum of the flow ratios for the critical lane groups. (2) calculate the minimum cycle length and the effective green time for each phase (balancing v/c for the critical lane groups). Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired.arrow_forwardPROBLEM 2. A lane group in an intersection approach with a pre-timed signal has a phase with display green of 48, with 4 seconds of yellow and all-red time and 2 seconds of lost time. The uniform delay in this signal phase is 12 seconds per vehicle and the ratio of volume to capacity is 0.8 with a satuation flow rate of 1,600 veh/h. Question: Determine the effective red and arrival rate of this lane group.arrow_forwardQ2: What are the assumptions for using the equations in the queue test? Q3: A signalized intersection, of 105 sec cycle length, the east approach has an effective green time of 20 sec, and the percentage of vehicles arriving during green time is 28%. The west approach has 16 sec green time and 32% of vehicles arriving during the green time. Determine which approach is best coordinated with the upstream signal.arrow_forward
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