Statistical Analysis of Safety Improvements and Integration Into Project Design Process

Tarko, Andrew P.; Romero, Mario; Lizarazo, Cristhian; Pineda, Raul

doi:10.5703/1288284317121

i

Statistical Analysis of Safety Improvements and Integration Into Project Design Process

2020-04-01
By Tarko, Andrew P. ; Romero, Mario ; Lizarazo, Cristhian

File Language:

English

Details

Creators:

Tarko, Andrew P. ; Romero, Mario ; Lizarazo, Cristhian ; Pineda, Raul
Corporate Creators:

Purdue University. Joint Transportation Research Program
Corporate Contributors:

Indiana. Dept. of Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/IN/JTRP-2020/09
DOI:

https://doi.org/10.5703/1288284317121
Resource Type:

Tech Report
Geographical Coverage:

Indiana ; United States
Edition:

Final Report
Corporate Publisher:

Purdue University. Joint Transportation Research Program
Abstract:

RoadHAT is a tool developed by the Center for Road Safety and implemented for the INDOT safety management practice to help identify both safety needs and relevant road improvements. This study has modified the tool to facilitate a quick and convenient comparison of various design alternatives in the preliminary design stage for scoping small and medium safety-improvement projects. The modified RoadHAT 4D incorporates a statistical estimation of the Crash Reduction Factors based on a before-and-after analysis of multiple treated and control sites with EB correction for the regression-to-mean effect. The new version also includes the updated Safety Performance Functions, revised average costs of crashes, and the comprehensive table of Crash Modification Factors—all updated to reflect current Indiana conditions. The documentation includes updated Guidelines for Roadway Safety Improvements. The improved tool will be implemented at a sequence of workshops for the final end users and preceded with a beta-testing phase involving a small group of INDOT engineers.
Format:

PDF
Funding:

SPR-4216
Download URL:

https://rosap.ntl.bts.gov/view/dot/55489/dot_55489_DS1.pdf
File Type:

[PDF - 3.59 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:e589acaed3b4e11a7ddd45e0e0220b56392c01974a94084136cc040404e1e9df

File Language:

English

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