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Track: Transportation, Logistics Planning
Robert Lindquist
GIS Solutions, Inc.
2387 W Monroe Street Suite 137
Springfield, IL 62704
Telephone: 217-540-3652
Fax: 217-546-3839
E-mail: gisspi1@gis-solutions.com
James Hall, A.J. Romanelli, Mary Ann Paulis, James Wright
Using GIS for Highway Management and Planning at the Illinois Department of Transportation
Defining Issue: Managing a roadway network of more than 138,000 miles of highway, almost 26,000 structures, and nearly 10,000 public railroad crossings requires a process to integrate and display information for a variety of uses. The purpose of the paper is to highlight the many and varied GIS applications at IDOT, and to discuss the challenges of integrating an existing state-wide roadway information system into the GIS environment including the development of route system through dynamic segmentation on existing link-node data. GIS Solution: The Illinois Department of Transportation (IDOT) along with GIS Solutions, Inc. compiled the appropriate data and developed ArcInfo and ArcView applications, which relied heavily on dynamic segmentation. The purpose was to provide managers and planners with comprehensive highway, environmental, and demographic data for mapping and decision making. Methodology: Data from the Illinois Roadway Information Systems (IRIS) and Illinois Highway Information System
(IHIS) were converted into ArcInfo route systems from IDOT's link-node data format. ArcInfo dynamic segmentation tools allowed a long list of highway attributes to be associated with roadway segments by mile measure. The resulting route systems are the base from which a number of highway management and planning functions are developed, everything from analyzing accident locations to planning repairs and improvement. To facilitate ease of use, Avenue code was written to perform a number of query/display applications in ArcView. Software: ArcInfo (dynamic segmentation), ArcView, Avenue
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