Traffic and Highway Engineering - With Mindtap
5th Edition
ISBN: 9781305360990
Author: Garber
Publisher: CENGAGE L
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Chapter 12, Problem 22P
To determine
A value for the calibration constant for the bus mode that reflects this shift in mode split.
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A mode choice logit model is to be developed based on the following information. A surveyof travellers in an area with bus service found the following data:Model Parameter Auto BusX1, waiting time (min.) 0 10X2, travel time (min.) 20 35X3, parking time (min.) 5 0X4, out-of-pocket cost (cents) 225 100Ak, calibration constant _0.33 _0.27The following utility functions were calibrated based on an observed mode split of 84.9%private auto use and 15.1% bus use.Utility function: Uk = Ak -- 0.10 X1 - 0.13 X2 - 0.12 X3 - 0.0045 X4After implementing service improvements to the buses, the mode split changed to 81.6%private auto use and 18.4% bus use. Determine a value for the calibration constant for the busmode that reflects this shift in mode split.
What is the 85th percentile speed and why is it important to
the transportation engineers? With the data provided in the table
below, plot the cumulative frequency curve on a graph in the next
page and determine the 85th percentile speed.
10.
Table: Spot Speed Dataset of a freeway road section
Spot Speed of Frequency of
Vehicles (mph)
Vehicles (n)
60
61
2
62
6.
63
7
64
24
65
45
66
30
67
12
68
4
69
4
1. A transportation engineering study was conducted to determine the proper design of bike
lanes. Data were gathered on bike - lane widths and average distance between bikes and
passing cars. (Use three decimal places) The data from 9 streets are:
Distance
2.4
1.5
2.4
1.8
1.8
2.9
1.2
3
1.2
(m)
Lane Width
2.9
2.1
2.3
2.1
1.8
2.7
1.5
2.9
1.5
(m)
a. Manually plot the data (draw to scale)
b. Fit a straight line to the data with linear regression. Add this line to the plot.
Chapter 12 Solutions
Traffic and Highway Engineering - With Mindtap
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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