Traffic and Highway Engineering - With Mindtap
5th Edition
ISBN: 9781305360990
Author: Garber
Publisher: CENGAGE L
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Chapter 11, Problem 22P
To determine
The three potential problems with the given structure.
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In a survey in the base year, the trip attraction, number of employees and shopping area in the zones are found
as follows:
Zone
1
2
3
4
5
6
7
8
9
10
Trip attraction
(Trips/day)
34,000
33,000
37,000
9,000
19,000
20,000
50,000
22,000
21,000
5,000
Number of employees
(persons)
2000
1500
3000
500
1000
1000
3200
1800
1600
200
Shopping area (m²)
250,000
350,000
150,000
80,000
160,000
180,000
350,000
60,000
100,000
50,000
Prepare a excel worksheet to calculate the generation model by regression analysis.
The present trip ends and travel time matrix between the zones are shown in Tables 6.75 and 6.76,
respectively. Travel impendance factor between the zones may be assumed to be e-ti. The socio-economic
adjustment factors between the zones may be assumed to one. Calculate the trip interchanges between
the zones by using the gravity model.
TABLE 6.75
Zones Trips produced Trips attracted
1
2
3
2500
3300
3200
TABLE 6.76
1 2 3
1-15 20
2 15
10
3 20 10
I
3000
4000
2000
4. The present trip ends and travel time matrix between the zones are shown in Tables 6.75 and 6.76,
respectively. Travel impendance factor between the zones may be assumed to be e-tij, The socio-economic
adjustment factors between the zones may be assumed to one. Calculate the trip interchanges between
the zones by using the gravity model.
TABLE 6.75
Zones Trips produced Trips attracted
1
2500
3000
2
3300
4000
3
3200
2000
TABLE 6.76
1 2 3
1
15 20
2 15
10
3 20 10
Chapter 11 Solutions
Traffic and Highway Engineering - With Mindtap
Ch. 11 - Prob. 1PCh. 11 - Prob. 2PCh. 11 - Prob. 3PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Prob. 9PCh. 11 - Prob. 10P
Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Prob. 16PCh. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Prob. 21PCh. 11 - Prob. 22PCh. 11 - Prob. 23PCh. 11 - Prob. 24PCh. 11 - Prob. 25PCh. 11 - Prob. 26PCh. 11 - Prob. 27P
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- Determine the trip distribution matrix using "Gravity Model" of transport system with given the data: Trip Production of Zones 1, 2 and 3, correspondingly are 500, 600, and 800 tpd Trip Attraction of Zones 1, 2 and 3, correspondingly are 600, 700 and 600 tpdarrow_forwardA small town has been divided into three traffic zones. An origin-destination survey was conducted earlier this year and yielded the number of trips between each zone as shown in the table below. Travel times between zones were also determined. Provide a trip dis- tribution calculation using the gravity model for two iterations. Assume K,= 1. The following table shows the number of productions and attractions in each zone. 3. Total Zone Productions 250 450 300 1000 Attractions 395 180 425 1000 The survey's results for the zones' travel time in minutes were as follows. Zone 1 1 4 2. 4 8. 3. 3. 3. 5 The following table shows travel time versus friction factor. Time (min) 3 4. 6. 7 8. Friction Factor 82 52 50 41 39 26 20 13arrow_forwardFind at least 5 Case Studies/ Projects related to transportation engineering that utilized Trip Generation, Trip Distribution, Model Split and Trip Assignment.arrow_forward
- The following 3 Travel Demand Forecasting models were created to estimate the number of peak-hour trips in the suburb of Croydon: T1 = 1.0 + 0.3(household size) + 0.01(household income in thousands of $) T2 = 1.5 + 0.2(household size) + 0.01(household income in thousands of $) T3 = 0.5 + 0.5(household size) + 0.01(household income in thousands of $) The suburb has a total of 3500 households with an average of 4 people per household, an average household income of $90,000 and survey data shows that it generates a total of 11,550 trips in the peak-hour. Which of the above models is the most accurate? A. T1 B. T2 C. T3 D. Can't say as 2 or more models are equally accurate.arrow_forwardMiami, Oklahoma has three transportation analysis zones, and origin-destination survey results. Using a spreadsheet, provide a trip distribution calculation using the gravity model. The following table shows the number of productions and attractions in each zone, as well as the socioeconomic adjustment factor.arrow_forwarda) Table 4 indicates an urban zone’s expected household composition at some future year and the calibrated educational-based trip rates. Estimate the total educational-based trips in terms of "y" that the urban zone will produce on a typical day in the horizon year. (A Table 4: Household composition and trip generation rates Number of motor vehicles per household Number of persons per household 1 2793 1.7y 4 5+ 2046 H. 344 2472 3092 R 0.8y 2.Зу 717 3.1x 2.4y 1022 3.1x 2.4y 726 2+ H 294 2.1x R 1.6x 3.3х H= Number of households in category R= Educational trip production rate (per household) in category x-0.5yarrow_forward
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