Developing components of the Indiana Safety Management System
Abstract
Indiana uses the Road Hazard Analysis Tool (RoadHAT) to support all steps in the Federal Highway Administration's (FHWA) Highway Safety Improvement Program (HSIP) process. To identify hazardous locations, RoadHAT uses safety performance functions developed for state roads from an extensive road database. Safety projects are identified on the basis of site investigation results and then prioritized using economic benefit-cost analysis. Many components of Indiana's current Safety Management System (SMS) were developed nearly ten years ago and require updating. In addition, Indiana has yet to implement these practices for local roads to follow the FHWA's High Risk Rural Road Program (HRRRP) recommendations. This thesis updates the HSIP process currently used for state roads, and helps implement this process for local roads. The thesis helps accomplish these objectives by carrying out a workshop with local agencies to discuss their needs and preferences for a safety management tool, a thorough literature review of SMS components that facilitate state and local needs, data collection and processing, as well as modeling and producing new safety performance functions for three crash severities (as in current safety analysis practice). The safety performance functions are developed in SAS 9.2 with a negative binomial regression for twenty-four types of road facilities, including road segments, intersections, interchanges, bridges, and ramps. Crashes that occurred in Indiana from 2008 to 2010 are used for this analysis. This research strengthens the Indiana Safety Management System and assists the state and local agencies in receiving funds for needed safety improvements.
Degree
M.S.C.E.
Advisors
Tarko, Purdue University.
Subject Area
Civil engineering
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.