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Full-Text Articles in Urban Studies and Planning

Research Note: Determinants Of Bus Dwell Time, Kenneth Dueker, Thomas J. Kimpel, James G. Strathman, Steve Callas Aug 2003

Research Note: Determinants Of Bus Dwell Time, Kenneth Dueker, Thomas J. Kimpel, James G. Strathman, Steve Callas

Center for Urban Studies Publications and Reports

This research note reports an analysis of dwell times at bus stops using archived Automatic Vehicle Location/ Automatic Passenger Counter (AVL/APC) data reported at the level of the individual bus stop. The data provide a large number of observations that serve to better understand the determinants of dwells, including analysis of rare events, such as lift operations. The analysis of bus dwell times at bus stops is applicable to TriMet, the transit provider for the Portland metropolitan area, and transit agencies in general. The determinants of dwell time include passenger activity, lift operations and other effects: low floor bus ...


Headway Deviation Effects On Bus Passenger Loads: Analysis Of Tri-Met’S Archived Avl-Apc Data, James G. Strathman, Thomas J. Kimpel, Steve Callas Jan 2003

Headway Deviation Effects On Bus Passenger Loads: Analysis Of Tri-Met’S Archived Avl-Apc Data, James G. Strathman, Thomas J. Kimpel, Steve Callas

Center for Urban Studies Publications and Reports

In this paper we empirically analyze the relationship between transit service headway deviations and passenger loads, using archived data from Tri-Met’s automatic vehicle location and automatic passenger counter systems. The analysis employs two-stage least squares estimation to account for the simultaneous relationship between headway deviations and loads. Controlling for the effects of passenger activity on delay, the results indicate that the observed incidence of excess passenger loads is systematically attributable to deviations from scheduled headways. In turn, analysis of the causes of headway deviations served to identify possible operations control actions that would improve service regularity and, consequently, reduce ...