Magnitude of mode constants in transit mode choice
Document Type
Journal Article
Publication Date
2020
Subject Area
place - north america, ridership - mode choice, ridership - forecasting
Keywords
Calibration, qualitative factors, mode constants, transit ridership forecasting, unmeasured attributes in mode choice models
Abstract
This study aims to improve the calibration procedures in mode choice modules for transit ridership forecasting through better understanding of calibrated mode constants representing unmeasured inputs. In this study, the magnitude of mode constants is examined by relative importance to measurable components of mode choice utility, using data from Philadelphia and Washington DC. In the case of walk-access modes, the mode constants in study cities account for about 41%–65% of total utilities. The results demonstrate that, in some cases, mode constants are large enough to render models insensitive to changes of important but omitted factors such as reliability, comfort, access environment, and safety. This study provides some evidence on what portion of travel cost between an origin and a destination is comprised of a fixed mode constant. By applying the approach, it is useful to identify problematic segments that have unusually large mode constants.
Rights
Permission to publish the abstract has been given by Taylor&Francis, copyright remains with them.
Recommended Citation
Jung, Y., & Casello, J.M. (2020). Magnitude of mode constants in transit mode choice. International Journal of Sustainable Transportation, Vol. 14(10), pp. 777-787.
