Geospatial Safety Information Systems Program (GSIS)

The Geospatial Safety Information Systems Program concentrates on safety data analysis and visualization tools. Many safety data-related tools developed by CTRE contribute to collecting, sharing, and integrating crash data across Iowa and across the country.


For more information about GSIS contact

Safety analysis


Iowa Traffic Safety Data Service (ITSDS) (

ITSDS provides agencies with the most readily available crash data analysis resources in Iowa. It was created to fill the gap between what safety data users can gather for themselves and what they can obtain from experts. ITSDS uses the latest in geographic information systems technology developed by the Iowa DOT. Using the data and analyses provided by ITSDS, agencies can help reduce the number of crashes in their jurisdictions.
The ITSDS is responsible for performing on-demand crash analysis for both public and private entities, annually addressing more than 100 requests from approximately 40 different sources. Recurring ITSDS activities include providing analysis and support for the Iowa DOT’s “Five Percent Report”, the High Risk Rural Road Program, the road safety audit program, local road safety workshops, multi-disciplinary safety team workshops, helmet survey summary and GTSB corridor enforcement efforts.


Officer Information Manager

The Officer Information Manager technology, a key component of the National Model, automates the completion of driver- and vehicle-related reports by law enforcement officers in the field using pen-based computers.

Incident Location Tool (IMAT)

The incident location tool uses geographic information systems software to provide users with a map-based computer screen for entering crash data. It's one part of a larger data collection and management technology system that approximately 200 Iowa agencies are using to share safety information. The incident location tool was originally developed for the Iowa DOT. The tool has also been adopted by several other states including South Dakota, Florida, Georgia, Delaware, and New York.

Incident Mapping and Analysis Tool (IMAT) and Crash Mapping and Analysis Tool (CMAT)

These tools analyze crashes throughout the state with set criteria. Local agencies use IMAT. CMAT is used to analyze crashes from the statewide crash database.

Accident Location and Analysis Systems (ALAS)

For several years, CTRE has been involved with developing several iterations of location and analysis tools, from PC-ALAS to GIS ALAS and Access ALAS. The Safety Analysis, Visualization, and Exploration (SAVER) tool developed by the Iowa DOT is the final product.

Emergency Response Information System (ERIS)

The ERIS consists of GIS databases of local emergency response agency boundaries and attributes for the state of Iowa. A pilot project involved the emergency management systems and fire districts in 22 counties.

Related Projects


Major funding is provided through Iowa DOT, FHWA, Transportation Research Board (TRB)/National Cooperative Highway Research Program, TRB/Strategic Highway Research Program, AAA Foundation
for Traffic Safety, Midwest Research Institute, National Highway Institute, and the National Model/TraCS.

GSIS is a program of the Center for Transportation Research and Education at Iowa State University.

CTRE is an Iowa State University center, administered by the Institute for Transportation.

Address: 2711 S. Loop Drive, Suite 4700, Ames, IA 50010-8664

Phone: 515-294-8103
FAX: 515-294-0467


CTRE: Center for Transportation Research and Education
Iowa State University