Travel Demand Model - OKI

OKI/MVRPC Travel Demand Model – Version 6.01. BackgroundThis is Part III of the OKI/MVRPC model development report. It has been previously released asthe Task A.4.3, Trip Generation, a report that is part of a series of working papers that documentthe development of a consolidated travel demand model for the Ohio-Kentucky-Indiana Councilof Governments and the Miami Valley Regional Transportation Commission (OKI and MVRPCrespectively). This model development is undertaken under the framework of the North-SouthTransportation Initiative, a Major Investment Study focusing on the Interstate 75 corridor.This report documents changes made to the trip generation model components in order to adaptit to the consolidated OKI/MVRPC region. As in version 5.4 1 of the travel demand model, crossclassificationmodels are used to forecast trip productions for four trip purposes: home-basedwork, home-based university, home-based school and home-based other. Non home-based tripsare estimated after the mode choice step, and for this reason non-home based trip generation isaddressed separately. Regression models are used to forecast trip attractions for the same fourtrip purposes, as well as trip ends for internal-external trips at the internal zones. Trip factoringmethods (fratar) are utilized to forecast trip ends for taxi trips, external-external trips andinternal-external trips at the external stations. A parallel effort is underway to develop acommodity flow model, and consequently truck trip generation is not included in this report.This report discusses work performed to merge the MVRPC region into the OKI travel demandmodel, so as to forecast trip productions and attractions for the entire consolidated region. Italso discusses the re-estimation of the external trip table, including external-external andexternal-internal trip ends. The report covers the four jobstream steps that comprise tripgeneration: Build Socioeconomic Database (Step 12), Build Household Classifications (Step 14),Estimate Trip Productions by Market Segment (Step 15), and Trip Generation for home-basedpurposes (Step 16). A separate section discusses the geocoding of the cordon line survey as wellas the external trip estimation work.1 For a detailed description of the model version 5.4 please refer to Ohio-Kentucky-Indiana Regional Model.Tier 2 Version. Methodology and Validation Report. I-71 Corridor Transportation Study. Prepared for theOKI Regional Council of Governments by KPMG Peat Marwick LLP. October 1998.Trip Generation - Background 1