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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: 9781305581159
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Question
Chapter 12, Problem 18P
To determine
The calibration of the friction factors for one iteration.
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Students have asked these similar questions
A 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.
Zone
1
2
3
Total
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
3
1
6
4
2
2
8
3
3
1
3
The following table shows travel time versus friction factor.
Time (min)
1
2
4
7
8
Friction Factor
82
52
50
41
39
26
20
13
2.
A 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
13
A Study area with four transportation analysis zones has the following information:
Table 3: Trip productions and attractions for a four-zone study area and travel time between zones.
Travel Time, (t) (min)
Zone
Trip productions
Trip
I
220
2
240
3
330
4
230
attractions
350
270
210
190
Table 4: Travel time versus friction factor.
Time (min)
2
Friction Factor
61
1
78
from zone 1
4
9
10
6
3
47
4
37
from zone 2
5
29
5
6
7
5
6
22
from zone 3
7
17
6
8
7
6
8
14
from zone 4
9
10
8
9
11
7
10
8
Using a gravity model, determine the number of trips from zone to zone through two iterations. (Assume that the
socioeconomic adjustment factor is 1.0).
Chapter 12 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
Ch. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - Given a table with production and attraction data,...
Ch. 12 - Given a table with production and attraction data,...Ch. 12 - Prob. 12PCh. 12 - Prob. 13PCh. 12 - Prob. 14PCh. 12 - Prob. 15PCh. 12 - Prob. 16PCh. 12 - Prob. 17PCh. 12 - Prob. 18PCh. 12 - Prob. 19PCh. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - Prob. 25PCh. 12 - Prob. 26PCh. 12 - Prob. 27PCh. 12 - Prob. 28P
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- The Jeffersonville Transportation Study Area has been divided into four large districts (traffic zones). The following data have been collected for those districts. Provide a trip distribution calculation using the gravity model for two Assume Kij = 1.arrow_forwardA zone has been divided into four large districts (traffic zones). The following data has been collected for those districts. Provide a trip distribution calculation (single constrained) using the gravity model. Assume Kij = 1 (Check balancing of Tij = A after the first iteration) District 1 2 3 4 Travel Time Fij Productions 3400 6150 3900 2800 1 2.0 Attractions 2800 6500 2550 4400 4 1.6 6 1.0 1 4 11 15 10 9 10 0.9 0.86 Travel time (min) 2 3 11 15 6 6 6 6 9 11 11 12 0.82 0.80 4 10 9 11 4 15 20 0.68 0.49arrow_forwardQ1. The following is the number of trips and the number of households by the number of persons per household and the level of household income in a given zone. Persons/hh 1 2 3 4 5 or above Low No. of hh 93 72 59 120 13 Persons/household 1 2 3 4 5 or more Trip No. 222 341 417 1010 107 Income Medium Low 120 100 90 150 30 No. of hh 149 138 125 109 37 Trip No. 616 853 1025 1186 457 The forecasted number of households in the study area for a target year is shown below. High Income Medium 280 220 190 180 60 No. of hh 96 27 33 40 33 Trip No. 360 205 381 471 423 High 130 40 50 70 60arrow_forward
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- A study area consists of three zones. The data have been determined as shown in the following tables. Zone Productions and Attractions Zone 1 2 3 Total Trip Productions 140 330 280 750 Trip Attractions 300 270 180 750 Travel Time between zones (min) Zone 1 3 1 5 3 2 3 3 5 Travel Time versus Friction Factor Time (min) F 1 82 2 52 3 50 4 41 5 39 6 26 7 20 8 12 Determine the number of trips between each zone using the gravity model. Show all steps in the calculation of friction factors and iterations for balancing attractions and productions. 6.arrow_forwardAn airport runway accommodates 18 arrival flights in an hour and departure flights occur every 2.1429 minutes during normal weather season. During holidays, arrival flights are increase to 24 but on bad weather conditions, departure flights is changed to 2.727 minutes due to a decline in flight departures. Determine the queueing characteristics of the airport during these conditions.arrow_forwardA multiple regression analysis shows the following relationship for the number of trips per household. T = 0.82 + 1.3P + 2.1A Where T = number of trips per household per day P= number of persons per household A= number of autos per household If a particular TAZ contains 250 households with an average of 4 persons and 2 autos for each household, determine the average number of trips per day in that zonearrow_forward
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