SafetyAnalyst is an advanced software system designed to provide the state and local highway agencies with a comprehensive set of tools to enhance their programming of site-specific highway safety improvements. As one of the 27 states that sponsored the development of SafetyAnalyst, the Florida Department of Transportation (FDOT) is interested in deploying the system for Florida for both state and local roads. This project was initiated to accomplish six major tasks as part of FDOT's overall SafetyAnalyst deployment effort. First, Florida-specific Safety Performance Functions (SPFs) for all roadway types for which data are available were developed. They included the SPFs for 17 segment subtypes, 4 signalised intersection subtypes, and 10 ramp subtypes. Second, the availability of the required average annual daily traffic (AADT) data for local roads from local agencies was investigated and summarized. Third, existing methods for estimating AADTs were reviewed and a new method for estimating AADTs for local roads using a parcel-based travel demand modelling approach was developed. Fourth, an existing mapping program developed by the University of South Florida (USF) to generate SafetyAnalyst data sets was reviewed and some mapping problems were identified and corrected. Fifth, a standalone desktop Geographic Information System (GIS) system customized for SafetyAnalyst input and output files was developed. Specifically, the system allows the user to graphically select site locations and to map SafetyAnalyst output. Finally, by applying the results from the tasks above, including the Florida-specific SPFs, the corrected mapping program, and the GIS system, statewide and district-wide lists of high crash locations for segments, signalised intersections, and ramps were successfully generated using SafetyAnalyst and presented in this report. (Author/publisher)
Samenvatting