assn3 - 1.201J / 11.545J / ESD.210J Transportation Systems...

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Unformatted text preview: 1.201J / 11.545J / ESD.210J Transportation Systems FALL 2006 ASSIGNMENT 3 : Transportation Demand and Costs Date assigned: October 3, 2006 Date due: October 17, 2006 Value: 10 points To be done in teams of 2. Both members on the team should work collaboratively on all parts of the assignment. Dividing the work and working separately on different questions or different parts of questions is not appropriate. Both team members will be responsible for the final answers. Question 3A (60%) Consider the following urban travel choice situation: MIT students are attending a subject taught at the Kennedy School of Government in the spring semester which meets Tuesday and Thursday mornings from 10:30 to noon. These students do not have access to automobiles and in any case would be unable to park close to the Kennedy School in mid- morning so their choices for getting to and from the Harvard class are: 1. Access MBTA bus route #1, alight at Harvard Square, and walk from there to the Kennedy School. 2. Walk to Kendall Square, take the MBTA Red Line to Harvard and walk from there. 3. Walk from MIT to the Kennedy School. A recent study has estimated the following utility function for mode choice which could be applied to this choice scenario: COST WT TA IVTT V i * 00 . 2 * 29 . * 42 . * 17 . = IVTT: In-vehicle travel time (minutes) TA: Access or walk time (minutes) WT: Wait time (minutes) COST: Fare (dollars) Note: 1) Mean in-vehicle travel times (IVTT) and wait times (WT) were used to estimate this utility function. 2) The shape parameter in the logit function , is 1.0 Data has been analyzed to derive the following level of service attributes for the relevant services at the time of day on interest: Function A: PDF of in-vehicle travel time (IVTT) for MBTA bus route #1 0.2 10 20 13 Probability Minutes 0 Function B: PDF of wait time for MBTA bus route #1 20 Probability Minutes 0.1 0 8 Function C: PDF of in-vehicle travel time (IVTT) for MBTA Red Line 0.4 8 13 Probability Minutes 0 Function D: PDF of wait time for MBTA Red Line 0.2 4 Probability Minutes 0 10...
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assn3 - 1.201J / 11.545J / ESD.210J Transportation Systems...

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