Publication

Random Forest Models for Identifying Motorway Rear-End Crash Risks Using Disaggregate Traffic Data and Meteorological Information

André-Gilles Dumont, Ashish Bhaskar, Edward Chung, Minh Hai Pham
2010
Conference Papers

Abstract

This paper presents an approach to develop motorway Rear-End Crash Risk Identification Models (RECRIM) using disaggregate traffic data, meteorological data and crash database for a study site at a two-lane-per-direction section on Swiss right-hand driving motorway A1. Traffic data collected from inductive double loop detectors provide instant vehicle information such as speed, time headway, etc. We define traffic situations (TSs) characterized by 22 variables representing traffic status for 5-minute intervals. Our goal is to develop models that can separate TSs under normal conditions and TSs under traffic conditions preceding rear-end crashes using Random Forest encapsulated in TreeBagger class developed in MatLab by The MathWorks ([1]). Normal TSs for the whole year of 2005 were clustered to form groups of similar normal TSs that we call traffic regimes (TRs). Pre-crash TSs are classified into TRs so that a RECRIM for each TR is developed. Interpreting results of high performance models suggests that speed variance on the right lane and speed difference between two lanes are the two main causes of the rear-end crashes. In this paper, we also discuss about the applicability of RECRIM in a real-time framework. [1] Mathworks, T. Regression and Classification by Bagging Decision Trees. Volume, http://www.mathworks.com/access/helpdesk/help/toolbox/stats /br0gosr-1.html, Jan 22, 2010

Official source

https://infoscience.epfl.ch/entities/publication/d2dcee43-f2c1-493e-94ed-5b1838c3a7b1

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André-Gilles Dumont, Ashish Bhaskar, Edward Chung, Minh Hai Pham
2010
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d2dcee43-f2c1-493e-94ed-5b1838c3a7b1

About this result

Related concepts (23)

Controlled-access highway

A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms include throughway (or thruway) and parkway. Some of these may be limited-access highways, although this term can also refer to a class of highways with somewhat less isolation from other traffic. In countries following the Vienna convention, the motorway qualification implies that walking and parking are forbidden.

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Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, expressed as kilometres per hour (km/h) or miles per hour (mph) or both. Speed limits are commonly set by the legislative bodies of national or provincial governments and enforced by national or regional police and judicial authorities.

Road traffic safety

Road traffic safety refers to the methods and measures used to prevent road users from being killed or seriously injured. Typical road users include pedestrians, cyclists, motorists, vehicle passengers, horse riders, and passengers of on-road public transport (mainly buses and trams). Best practices in modern road safety strategy: The basic strategy of a Safe System approach is to ensure that in the event of a crash, the impact energies remain below the threshold likely to produce either death or serious injury.

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