Cross-cutting Issues

Data from inductive loop detectors is widely used as input to many ATMS applications. However, for several reasons, loop detectors are prone to failures. This leads to erroneous data that significantly reduces the accuracy of the applications that utilize detector data as input. The work that has been done in the past to develop procedures to test the quality of detector data is inadequate since there are several forms of corrupt data that still remain undetected. Moreover, procedures to correct erroneous data identified are also lacking. This paper presents an improved procedure to test the reliability of detector data as well as a procedure for correcting erroneous data. The data screening and correction procedure is applied to detector data from sensors of a real freeway section to demonstrate its effectiveness and applicability.

University of Minnesota

Presented at the ITS America Annual Conference and Exposition, May 19-22, 2003 Minneapolis, Minnesota

The ITS Joint Program Office (JPO) collects information on ITS costs, and maintains this information in the ITS Unit Costs Database http://www.benefitcost.its.dot.gov/). The costs database is a central site for ITS costs data and is based on the most recent data collected by the JPO. Its purpose is to make cost data available to public and private organizations. The database also provides data that the ITS JPO can use for programmatic and policy decisions, and education of ITS stakeholders. The database can be viewed and downloaded as a costing tool for ITS implementers. The costs database is updated bi-annually (September and March). The goal in updating the costs database is to ensure that the cost ranges established in the database are still valid and to attempt to fill gaps where data is missing with emphasis on operations and maintenance (O&M)data.

US DOT ITS JPO

Presented at the ITS America Annual Conference and Exposition, May 19-22, 2003 Minneapolis, Minnesota

Cambridge Systematics, Inc. under subcontract to PB Farradyne, was hired by the Florida Department of Transportation (FDOT), District 6, to conduct a pre-deployment estimation of the impacts of ramp-metering on the I-95 corridor in Miami, FL. A total of twenty two I-95onramps in the vicinity of downtown Miami, are scheduled for ramp- metering starting in the year 2005. The purpose of this project is to estimate the impacts of ramp- metering on the I-95 corridor on the Miami-Dade County roadway network. The impacts estimation was performed using the ITS Deployment Analysis System (IDAS)1 model and will serve the following purposes:· The development of a technically sound regional IDAS model to assess the impacts of ramp metering on the I-95 corridor. · The results of the IDAS analysis will be used to identify ramp- meter sites for further data collection, simulation analysis and evaluation. · Communication of the expected impacts of ramp- metering to the traveling public in Miami- Dade County.

Cambridge Systematics, Inc.

Presented at the ITS America Annual Conference and Exposition, May 19-22, 2003 Minneapolis, Minnesota

Since the late 60’s the New York City Department of Transportation (NYCDOT) has been operating and expanding its Vehicular Traffic Control System (VTCS) in order to help manage traffic signal timing and coordination throughout the city. Currently over half of the city’s 12,000 plus signalized locations are under VTCS control. Due to the city’s vast size, NYCDOT currently employs various means of communicating with remote signalized locations. These communication methods include a city owned and operated coaxial cable system within the borough of Manhattan. In the remaining four boroughs, NYCDOT utilizes dedicated twisted pair telephone lines to communicate with the traffic signals on the VTCS system. In addition to the traffic signal system, NYCDOT employs the VTCS to operate over 70 traffic surveillance cameras within Manhattan.

New York City DOT

Presented at the ITS America Annual Conference and Exposition, May 19-22, 2003 Minneapolis, Minnesota

Since the US DOT released the Final Rule 940 in April 2001that requires the development of a regional ITS architecture for all metropolitan areas, most regions have initiated or completed an ITS architecture. The first step in the ITS architecture development process is to conduct an extensive discussion with the region’s stakeholders. While every region has different transportation, public safety and security issues, there are a number of common themes emerging from stakeholder discussions across the country.

This paper describes some of these common themes and some differences in ITS functions generated by local issues. The comments expressed in this paper are based on the experience of the author and are not been confirmed by research or analysis of data.

PB Farradyne

Presented at the ITS America Annual Conference and Exposition, May 19-22, 2003 Minneapolis, Minnesota