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Title:

A Proposed Generalized Framework for the Identification of Contributing Factors Which Affect Hazardous Traffic Conditions on Freeways

Accession Number:

01663311

Record Type:

Component

Abstract:

The identification of hazardous traffic conditions with high crash risk has the potential to enhance traffic safety. Crash risk is affected by multiple factors such as traffic parameters, geometric characteristics and weather conditions. This study proposes a generalized framework that can be applied universally for the identification of significant contributing factors which increase crash risk under five types of freeway segments and for the evaluation of the distinct impact each of the said types has on crash risk. 34 traffic parameters and three weather data for five segment types were collected as candidate contributing factors. The data collection site was a 13.14-mile segment of the northbound direction of the I-110 freeway in California. Random Forest and three statistical analysis tests were conducted to identify the best contributing factors for the five segment types. The results showed that each segment type has its own particular contributing factors. Then, Bayesian logistic regression was used to build crash risk prediction models to explore the constant effects of each of the contributing factors on the change in crash risk with an odds ratio. The results indicate that the intensity and direction of each factor on crash risk were distinct across segment types. The outcomes can be used for monitoring crash risk for a certain consecutive portion of a freeway with a real-time change in crash risk updates. By monitoring the change in the contributing factors, traffic managers can predict which segments are in hazardous traffic conditions and how fast those conditions change in real-time.

Supplemental Notes:

This paper was sponsored by TRB committee ANB10 Standing Committee on Transportation Safety Management. Alternate title: A Proposed Generalized Framework for the Identification of Contributing Factors That Affect Hazardous Traffic Conditions on Freeways

Report/Paper Numbers:

18-05601

Language:

English

Authors:

Chang, Hyoseuk
Haghani, Ali
Daneshgar, Farzad

Pagination:

9p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Geographic Terms:

California

Subject Areas:

Highways; Operations and Traffic Management; Safety and Human Factors

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-05601

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 11:26AM