Site Impact Analysis
Interchange Justification
Sitemap for GIS-TPT
Bypass Analysis


Geographic Information System - Traffic Planning Tools

The objective of this project is to develop tools and procedures to assist Iowa transportation planners and traffic engineers in conducting various impact studies. The Iowa DOT Transportation Planning and Modeling Research Needs Focus Group has identified three types of studies, in particular, that are likely to benefit from improved modeling techniques. These are: site impact analysis, interchange and other major infrastructure justification and bypass analysis.

The goal of this informational tool is to help guide and answer questions related to the three types of studies. This tool can either be used by following the provided links or by using the site map feature which allows the user to jump to any location they desire. To begin, please select the appropriate type of analysis or the map button to view all the pages.


CTRE is an Iowa State University center.

Contact CTRE, 2901 South Loop Drive, Suite 3100, Ames, Iowa 50010-8632
Phone  515-294-8103 ~ Fax 515-294-0467

CTRE communications Marcia Brink ~ CTRE webmaster Michele Regenold