A simple work mode choice is estimated from data in a small urban area to determine the probabilities of individual travelers selecting various modes. The mode choice includes auto-drive alone (DL), auto-shared ride (SR) and Bus (B), and the utility functions are estimated asUDL = 2.2 - 0.2(Cost DL) - 0.03(travel time DL)USR = 0.8 - 0.2(cost SR) - 0.03(travel time SR)UB = - 0.2(cost B) - 0.01(travel time BWhere cost is in Rand and time in minutes. Between a residential area and an industrial complex, 4000 workers (generating vehicle based trips) depart for work during the peak hour. For all workers, the cost of driving an automobile is R 4.00 with travel time of 20 minutes and the bus fare is 50 cents with a travel time of 25 minutes. If the shared ride option always consists of two travelers sharing costs equally, how many workers will take each mode.

A simple work mode choice is estimated from data in a small urban area to determine the probabilities of individual travelers selecting various modes. The mode choice includes auto-drive alone (DL), auto-shared ride (SR) and Bus (B), and the utility functions are estimated asUDL = 2.2 - 0.2(Cost DL) - 0.03(travel time DL)USR = 0.8 - 0.2(cost SR) - 0.03(travel time SR)UB = - 0.2(cost B) - 0.01(travel time BWhere cost is in Rand and time in minutes. Between a residential area and an industrial complex, 4000 workers (generating vehicle based trips) depart for work during the peak hour. For all workers, the cost of driving an automobile is R 4.00 with travel time of 20 minutes and the bus fare is 50 cents with a travel time of 25 minutes. If the shared ride option always consists of two travelers sharing costs equally, how many workers will take each mode.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter2: Transportation Systems And Organizations

Section: Chapter Questions

Problem 4P

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Given the utility function: U = AA- 0.35(TT) – 0.08(WT) – 0.005(C) Question 2 where AA is the mode specific variable; TT is the travel time in minutes; WT is the waiting time in minutes; and Cis the travel cost in cents. The attributes of trips between two traffic analysis zones are shown in the table below. Calculate the probability of car and bus. Variable Car Bus AA -0.46 -0.07 TT 20 30 WT 8 320 100
Determine the share (proportion) of person-trips by each of two modes (private auto and mass transit) using the multinomial logit model and given the following informa- tion: Utility function: U = A - 0.05 T – 0.04 T, – 0.03 T, –0.014 C Parameter Private Auto Mass Transit = access time (min.) T. T = waiting time (min.) T, = riding time (min.) C = out-of-pocket cost (cents) Calibration constant, A 14 20 25 %3D 50 70 250 100 -0.012 -0.068
A work-mode-choice model is developed from data acquired in the field in order to determine the probabilities of individual travelers selecting various modes. The mode choices include automobile drive alone (DL), automobile shared-ride(SR), and bus (B). The utility functions are estimated as: UDL = 2.6 – 0.3(costDL) – 0.02(travel time DL) USR = 0.7 – 0.3(costSR) – 0.04(travel time SR) UB = –0.3(costB) – 0.01(travel time B) where cost is in dollars and time is in minutes. The cost of driving an automobile is $5.50 with a travel time of 21 minutes, while the bus fare is $1.25 with a travel time of 27 minutes. How many people will use the shared-ride mode from a community of 4500 workers, assuming the shared-ride option always consists of three individuals sharing costs equally?
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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.
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