6. (a) Define the peak hour factor (PHF)(b) Explain the traffic condition when PHF=1.7. The following table shows traffic flow data collected at the main road in an urban area, intwo successive days during the peak periodDay oneDay twoTimeFlow (veh)Flow (veh)7:30 – 7:459007:45 – 8:009509608:00 – 8:15101010158:15 – 8:30990980(a) Determine the peak hour factor (PHF)(b) Estimate the missing traffic flow count (x) on day two.

6 a. Peak Hour factor : PHF Peak Hour Factor is the ratio of hourly volume during highest or…

Answered: 6. (a) Define the peak hour factor…

Engineering

Civil Engineering

6. (a) Define the peak hour factor (PHF) (b) Explain the traffic condition when PHF=1.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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7. The following table shows traffic flow data collected at the main road in an urban area, in two successive days during the peak period Day one Flow (veh) Day two Time Flow (veh) 7:30 – 7:45 7:45 – 8:00 900 950 960 8:00 – 8:15 1010 1015 8:15 – 8:30 990 980 (a) Determine the peak hour factor (PHF) (b) Estimate the missing traffic flow count (x) on day two.
Consider the following data: · Average number of vehicles (overtaking - overtaken) = 1 • Average number of vehicles during trips in opposite direction of traffic flow = 336 · Average journey time when test vehicle is travelling with the stream = 8 min 31 sec. · Average journey time when test vehicle is travelling against the stream = 7 min 24 sec. Average journey time for the above data is min. %3D
TRAVEL TIME AND DELAY STUDIES • The shows data obtained in a travel time study on a section of highway using the moving-vehicle technique. Estimate (a) the travel time and (b) the volume in each direction at this section of the highway Run Direction/ Number Northward 2 4 5 6 7 8 9 10 Southward 3 4 6 7 8 9 10 No. of Vehicles Travel Traveling in Time Opposite Direction (min) 5.25 5.08 5.30 5.15 5.00 5.51 5.38 5.41 5.12 5.31 4.95 4.85 5.00 4.91 4.63 5.11 4.83 4.91 4.95 4.83 100 105 103 110 101 98 97 112 109 107 85 88 95 100 102 90 95 96 98 90 PARKING STUDIES No. of Vehicles That Overtook Test Vehicle 3 1 0 1 3 0 1 0 0 2 1 1 No. of Vehicles Overtaken by Test Vehicle 2 1 1 0 3 1 0 1 2 PROB 1. Data collected at a parking lot indicate that a total of 300 cars park between 8 a.m. and 6 p.m. 10% of these cars are parked for an average of 2 hr, 30% for an average of 4 hr, and the remaining cars are parked for an average of 10 hr. Determine the space-hours of demand at the lot PROB 2. If 10% of…
Spot speed study was carried out redesign the stretch of major district road. The data collected during th estudy is given below. (1) (ii) Speed Range kmph 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency of vehicles Cars Two Wheelers 5 20 24 20 30 35 25 10 10 1 0 6 12 30 60 35 35 15 18 9 What is the design speed for redesigning existing MDR? What are upper and lowe speed limits for mixed traffic? Others 0 4 4 5 30 30 15 10 2 0
Example - Floating car method The data collected from speed and delay studies by floating car method on a stretch of urban road of length 3.5 km, running North-South are given below. Determine the average values of volume, journey speed and running speed & SMS of the traffic stream along either direction. Trip Direction of Journey trip time No. 1234S00 5 6 7 8 N-S S-N N-S S-N N-S S-N N-S S-N Total stop No. of delay vehicles Min-Sec Min-Sec overtaking 6-32 7-14 6-5 7-40 6-10 8-00 6-28 7-30 1-40 1-50 1-30 2-00 1-10 2-22 1-40 1-40 4552 M N N M 3 2 2 3 No. of vehicle overtaken 733L5252 1 No. of vehicles from opposite direction 268 186 280 200 250 170 290 160
C. A data was gathered for the 10 vehicles passing in Katipunan Intersection every 15 seconds. Determine the Density, Flow of traffic per hour and space and time mean speed. Vehicle Distance "S" 99 m 1 95 m 96 m 94 m 2 4 96 m 99 m 93 m 7 8 92 m 98 m 10 97 m
from the following data of a freeway surveillance, there are 5 vehicles traveling distances "S" when observed on the two photographs taken every 2 seconds apart. Vehicles “S" (meters) 1 24.4 2 18.8 3 24.7 4 26.9 5 22.6 Determine the flow of traffic. Group of answer choices 8000 yph. 8500 yph 9000 yph 9500 yph.
1) 1) A section of highway has the following flow-density relationship: q-50k-0.156k² What is the capacity (maximum flow) of the highway section, the space mean speed at capacity, and the density when the traffic flow on the highway is at one-quarter of its capacity? 2) An observer has determined that the time headways between successive vehicles on a section of highway are exponentially distributed (arrival of vehicle is Poisson distribution) and that 60% of the headways between vehicles are 13 seconds or greater. If the observer decides to count traffic in 30-second time intervals, estimate the probability of the observer counting exactly four vehicles in an interval.
H.W: 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
From the following data of a freeway surveillance, there are 4 vehicles counted for a length of 200 m and the following distances each had travelled when observed on the photographs taken every 3 seconds apart. Compute the following:i. Density of flow in vehicles per km (vpk). ii. Space mean speed in kph. iii. Flow rate, in vehicles per hour. SHOW COMPLETE SOLUTION. NEED ASAP. THNAK YOU
Question 2: Speed observations from a radar speed meter have been taken, giving the speeds of the subsidiary streams composing the flow along with the volume of traffic of each subsidiary stream. The readings are as under: Calculate: (i) Time-mean speed (ii)Space-mean speed (iii) Variance about space mean speed. Is pitn 50 puns on s pese sped Speed Volume of subsidiary mmidel spued (km hr) stream (Vehicle hour) 2-5 6-9 4 10-13 14-17 18-21 20 2-5 22-25 44 26-29 80 30-33 82 34-37 79 38-41 49 42-45 36 46-49 26 50-53 6. 54-57 10 58-61
The vehicle count obtained in every 10-minute interval of a traffic volume survey done in peak one hour is given below. Time Interval (in minutes) 0-10 10-20 20-30 30-40 40-50 50-60 Vehicle Count 10 11 12 15 13 11 The peak hour factor (PHF) for 10 minute sub-interval is off to one decimal place) (round