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Title:

A Data-Driven Process for Prioritizing Highway Safety Investments in Idaho
Cover of A Data-Driven Process for Prioritizing Highway Safety Investments in Idaho

Accession Number:

01515842

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The Idaho Transportation Department (ITD) developed a data-driven method for identifying the highest priority locations for safety improvements and for evaluating the potential safety benefits of candidate projects. DKS developed criteria defining the Safety Health Score for each segment of the state highway system and used the score to identify the highest priority locations for safety analysis in each ITD district. Visualization of the highest priority locations was aided by Geographic Information System (GIS) mapping of the Safety Health Score. Five years of crash data for the high-priority locations was used to identify potential improvement projects. The Human Factors Guidelines were used to help identify crash causality and appropriate countermeasures for consideration. The Highway Safety Manual procedures provided the basic methodology for estimating the potential reduction in the number and severity of crashes from each of the potential improvements. In the application of the corridor safety analysis, a new approach was used to develop the data needed for the Highway Safety Manual procedures. The project team used the digital video logs that are collected for all state highway mileage each year to prepare estimates of values for numerous roadway characteristics including lane widths, shoulder widths, and locations of driveways and other private access points. The team developed a method for prioritizing safety projects based on an assessment of potential crash cost savings and the benefit-cost ratio of each potential project.

Supplemental Notes:

This paper was sponsored by TRB committee ADA50 Transportation Programming and Investment Decision-Making.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-0898

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Loudon, William R
Schulte, Robert J
Pilachowski, Joshua
Jennings, Brent

Pagination:

17p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; Tables

Identifier Terms:

Highway Safety Manual

Geographic Terms:

Idaho

Subject Areas:

Administration and Management; Highways; Safety and Human Factors; I10: Economics and Administration; I82: Accidents and Transport Infrastructure

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-0898

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Jan 27 2014 2:22PM