Commuters choose auto or bus for their trips. The utility function for each travel mode was calibrated as follows: where V=C-0.10* X₁ -0.13* X₂-0.12 X3-0.0045 X4 + V observable utilities; C = constant; X₁ = waiting time (min); X₂ = travel time (min); X3 = parking time (min); X₁ = out-of-pocket cost (cents). The values of the parameters in the above utility function for each mode are shown below. Mode C X₁ (min) X₂ (min) X3 (min) Auto 20 Bus 35 Mode Light rail -0.33 -0.27 C 0 10 5 0 (a) Calculate the mode splits of auto and bus using the multinomial logit model. (b) In the part (a), the new light rail will be added as the third mode of travel. The utility function for light rail is the same as above and the values of the parameters for light rail are shown below. X4 (cents) 225 100 X₁ (min) X₂ (min) X3 (min) 15 25 0 0 X4 (cents) 150 Predict the mode splits of auto, bus and light rail using the multinomial logit model. (c) Does the result in (b) make intuitive sense? Comment on the result based on the independent of irrelevant alternatives (IIA) property of the multinomial logit model and suggest how to overcome the limitations of the IIA property in this mode choice problem.

Commuters choose auto or bus for their trips. The utility function for each travel mode was calibrated as follows: where V=C-0.10* X₁ -0.13* X₂-0.12 X3-0.0045 X4 + V observable utilities; C = constant; X₁ = waiting time (min); X₂ = travel time (min); X3 = parking time (min); X₁ = out-of-pocket cost (cents). The values of the parameters in the above utility function for each mode are shown below. Mode C X₁ (min) X₂ (min) X3 (min) Auto 20 Bus 35 Mode Light rail -0.33 -0.27 C 0 10 5 0 (a) Calculate the mode splits of auto and bus using the multinomial logit model. (b) In the part (a), the new light rail will be added as the third mode of travel. The utility function for light rail is the same as above and the values of the parameters for light rail are shown below. X4 (cents) 225 100 X₁ (min) X₂ (min) X3 (min) 15 25 0 0 X4 (cents) 150 Predict the mode splits of auto, bus and light rail using the multinomial logit model. (c) Does the result in (b) make intuitive sense? Comment on the result based on the independent of irrelevant alternatives (IIA) property of the multinomial logit model and suggest how to overcome the limitations of the IIA property in this mode choice problem.

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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