Example - Floating car methodThe 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 & SMSof the traffic stream along either direction.Trip Direction of JourneytriptimeNo.1234S005678N-SS-NN-SS-NN-SS-NN-SS-NTotal stop No. ofdelay vehiclesMin-Sec Min-Sec overtaking6-327-146-57-406-108-006-287-301-401-501-302-001-102-221-401-404552 M N N M3223No. ofvehicleovertaken733L52521No. ofvehicles fromoppositedirection268186280200250170290160

Floating car method,Stretch of urban road of length 3.5 km.

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 No. 12345678 Direction of Journey time trip Min-Sec N-S S-N N-S S-N N-S S-N N-S S-N 6-32 7-14 6-50 7-40 6-10 8-00 6-28 7-30 Total stop delay Min-Sec 1-40 1-50 1-30 2-00 1-10 2-22 1-40 1-40 No. of vehicles overtaking 4552 M N N 3 3 2 2 No. of vehicle overtaken 5252T WEL 7 3 3 1 No. of vehicles from opposite direction 268 186 280 200 250 170 290 160

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 No. 12345678 Direction of Journey time trip Min-Sec N-S S-N N-S S-N N-S S-N N-S S-N 6-32 7-14 6-50 7-40 6-10 8-00 6-28 7-30 Total stop delay Min-Sec 1-40 1-50 1-30 2-00 1-10 2-22 1-40 1-40 No. of vehicles overtaking 4552 M N N 3 3 2 2 No. of vehicle overtaken 5252T WEL 7 3 3 1 No. of vehicles from opposite direction 268 186 280 200 250 170 290 160

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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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…
Question 2: The collected data in Table (1) from speed and delay studies by floating car method on a segment of urban road of length 3.5km, running North-South are given in table below: Table (1) Collected field data Trip No. Direction Journey of Trip Total No. of No. of No. of time stopped delay Min. sec. vehicles vehicles vehicles Min. sec. overtaking overtaken from opp. direction 1 N-S 6 32 1 40 4 7 268 S-N 7 14 1 50 3 186 3 N-S 6 50 1 30 280 S-N 7 40 2 00 1 200 6 10 1 10 2 22 N-S 3 250 S-N 8 00 170 7 N-S 6 28 1 40 2 290 8. S-N 7 30 1 40 2 160 Estimate the average travel time for North -South and South – North directions respectively.
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, in two successive days during the peak period Day one Day two Time Flow (veh) Flow (veh) 7:30 – 7:45 900 7:45 – 8:00 950 960 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
At the exit of a toll gate with a single booth, vehicles arrive at random at a rate of 20 vehicles per minute. The service has an average rate of 22 vehicles per minute. However, due to variable toll fees, the service is also random with an average rate of 22 vehicles per minute.Estimate average time vehicles spent in the systemGroup of answer choices0.400.500.450.35
This is the product of the arrival rate and average waiting time in the queue. a. Average waiting timeb. Average vehiclesc. Average length of queued. Average delay
At a specified point on a highway, vehicles are known to arrive according to a Poissonprocess. Vehicles are counted in 30-second intervals, and vehicle counts are taken in 120 ofthese time intervals. It is noted that no cars arrive in 18 of these 120 intervals. a) Approximate the number of these 120 intervals in which exactly three cars arrive. b) Estimate the Percentage of time headways that will be 10 seconds or greater andthose that will be less than 6 seconds.
4. When the accident rate (instead of accident number) is used to identify hazardous location, there is bias towards selecting low-flow locations with few accidents. B. False A. True 5. If all cars on one lane move at 25 mph and all cars on the second lane move at 30 mph, the time mean speed and space mean speed calculated for the 2-lane highway will be the same: Α. True B. False
Data on traffic accident recorded on a certain intersection for the past 5 years has an accident of 4160 per million entering vehicles. If the average daily traffic entering the intersection is 504, find the total number of accidents during 5-year period. Use L=10 miles. a. 3862 b. 38.62 c. 3826 d. 38.26
4-14 Table 4.10 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. Chapter 4 Traffic Engineering Studies 149 Table 4.10 Travel Time Data for Problem 4-14 No. of No. of No. of Vehicles Vehicles That Vehicles Run Travel Traveling in Орposite Overtook Overtaken by Test Vehicle Direction/ Time Test Number (min) Direction Vehicle Northward 5.25 100 2 2 2 5.08 105 2 1 3 5.30 103 3 1 4 5.15 110 1 5.00 101 6. 5.51 98 7 5.38 97 1 1 8 5.41 112 2 3 5.12 109 3 1 10 5.31 107 Southward 1 4.95 85 1 2 4.85 88 1 3 5.00 95 1 4 4.91 100 2 1 4.63 102 1 5.11 90 1 1 7 4.83 95 8 4.91 96 3 1 9 4.95 98 1 2 10 4.83 90 1
How are travel time and delay studies used? describe one method for collecting travel time and delay at a station of a highway. Expain how to obtain the following information collected a. Travel time b. Operational delay c. Stopped time delay d. Fixed delay and e. Travel time delay
A volume of 320 veh/h. Assume that the vehicle arrivals are Poisson distributed. What is the probability that the headway between successive vehicles will be less than 10 seconds. choices: 62.70%, 58.90%, 56.30%, 60.00%