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Turner-Fairbank Highway Research Center

 
 
 
 

GIS Safety Tools

Computerized crash analysis systems in which crash data, roadway inventory data, and traffic operations data can be merged are used in many state and municipalities to identify problem locations and asses the effectiveness of implemented countermeasures. By integrating this traditional system with a geographical information system (GIS), which offers spatial referencing capabilities and graphical displays, a more effective crash analysis program can be realized. The FHWA GIS Safety Analysis Tools include five separate programs to evaluate crashes:

  • Spot/Intersection Analysis
  • Strip Analysis
  • Cluster Analysis
  • Sliding-Scale Analysis
  • Corridor Analysis

For an overview of the GIS Safety Analysis Tools, see the Summary Report, GIS-Based Crash Referencing and Analysis System [PDF].

Requirements

In order to use the GIS Safety Analysis Tools, the following software must be installed on the local computer:

Application and Demonstration Datasets

The FHWA GIS Safety Analysis Tools application is contained within an installation package that can be downloaded once you have filled out the form at the bottom of this page.

Register for Free Download

Please fill out the following form completely to gain access to the software and datasets' free download. Your information will only be used to contact you with software updates. All fields are required.







If you have already registered, you may log in to download the software here.

Highlighted Reports

Development of a Speeding-Related Crash Typology

This study examined recent crash data through the development of an SR crash typology. Such a typology can help define the crash, vehicle, and driver characteristics that seem to result in a higher probability of SR crashes.

Download Report  View All Summary Reports

Evaluation of Lane Reduction "Road Diet" Measures on Crashes

A road diet involves narrowing or eliminating travel lanes on a roadway to make more room for pedestrians and bicyclists. While there can be more than four travel lanes before treatment, road diets are often conversions of four-lane, undivided roads into three lanes—two through lanes plus a center turn lane. This study resulted in the development of crash modification factors for this engineering treatment.

Download Report  View All Summary Reports