01373856

Component

GIS is one of today's most used programs for acquiring, analyzing and managing geographical referenced data. It is used in a variety of applications for planning, presenting, and analyzing data and results. ArcGIS provides the option of creating new tools by programming with different languages such as Visual Basic. Most of the available GIS-based traffic safety tools perform simple traffic crash analyses by querying, analyzing crash data and ranking of high crash locations by using crash data only. The objectives of this study were to review and identify the most important features and methods in safety analysis; to develop a safety analysis application using ArcGIS and Visual Basic and to use the application in a case study. The safety application developed is able to query traffic crashes by accident characteristics such as crash severity, road condition, collision type, light condition, etc. The application performs analysis on a micro and macro level. Eight different safety analysis methods were programmed, ranging from simple methods such as crash frequency to more advanced methods such as empirical Bayes (EB). A before-after study tool is added and is able to perform a naïve before-after study and an EB study. An output tool is added to the application so the results can be exported to other formats or maps. The application is tested with a case study using Montgomery County, Ohio as a study area.

This paper was sponsored by TRB committee ABJ20 Statewide Transportation Data and Information Systems

01362476

12-0383

English

19p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; References

Bayes' theorem; Crash analysis; Geographic information systems; Traffic safety

ArcGIS

Data and Information Technology; Highways; I71: Traffic Theory

Transportation Research Board Annual Meeting 2012 Paper #12-0383

TRIS, TRB

Feb 8 2012 4:54PM