Urban Studies and Planning Commons^™

Locating Truck Data Collection Sites In Oregon Using Representation Optimal Sampling, Kenneth Dueker, William A. Rabiega, Bruce Rex

Center for Urban Studies Publications and Reports

The Oregon Department of Transportation collects data on the performance of the highway system by sampling traffic volume, vehicle classification, truck weights, pavement conditions, etc. The selection of efficient and accurate locations for collecting data is important. This report addresses the larger sampling problem by focusing on locations for collecting truck weight data. Sites selected for weight-in-motion/automatic vehicle identification (WIM/AVI) within the Crescent/HELP project are assessed to determine their locational suitability for truck weight data collection. A method, Representation Optimal Sampling (ROS), to aid in site selection is reported here. Sampling configurations of six and twelve station using ROS are …

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, time …

Gis-T Data Sharing Issues, Kenneth Dueker, J. Allison Butler

Center for Urban Studies Publications and Reports

The purpose of this paper is to develop a framework and principles for sharing of transportation data. The framework is intended to clarify roles of the various participants and the principles are intended to provide guidance for the participants. Both the framework and the principles are based on a GIS-T data model that defines relations among transportation data elements. (See Dueker and Butler (1998) for a detailed description of the data model. A simplified version is provided in the next section.) The data model guards against ambiguities and provides a basis for the development of the framework and principles for …

Automated Bus Dispatching, Operations, Control, And Service Reliability: Baseline Analysis, James G. Strathman, Kenneth Dueker, Thomas J. Kimpel, Rick Gerhart, Ken Turner, Pete Taylor, Steve Callas, David Griffin, Janet Hopper

Center for Urban Studies Publications and Reports

The authors of this report are engaged in a long term project to assess the impacts of Tri-Met's BDS on service reliability and transit use. The framework designed for this assessment focuses on documenting service reliability and passenger activity at three major junctures:

• The pre-operational (baseline) period;

• The initial (passive) period following implementation of the new system, when both drivers and dispatchers have access to schedule adherence information in real time, but before the development and use of operations control practices that exploit the information generated by the system;

• Full implementation, when operations control practices are defined …

Traffic Data Selection: An Evaluation Of Siting Criteria For Permanent Traffic Recorders, Richard Ledbetter, Kenneth Dueker, Milan Krukar, Vern Tabery

Center for Urban Studies Publications and Reports

Traffic volume data are needed for design and construction zone traffic management. In addition, continuous traffic volume data (collected by automatic traffic recorders) is needed to factor short counts (24 hours or more) collected at key sites on the states highway network.

This study evaluates the procedures used by the Oregon Department of Transportation for collecting continuous traffic volume data to determine: (1) if the current location and number of automatic traffic recorders (ATRs) on Oregon's highway network is adequate for estimating monthly seasonal factors, and (2) if the current procedure of using group means, based on geographical regions, to …