Contact Us       Opportunities       Hawkmail

How do I get to NADS?

Publications »
Steering in a Random Forest Ensemble Learning for Detecting Drowsiness-Related Lane Departures

Document Number:N2014-028
Document Type:Journal paper
Author(s):A.D. McDonald
John Lee
Chris Schwarz
Timothy Brown
Publication / Venue Name:Human Factors
Publication Date:2014-08-01
The aim of this study was to design and evaluate an algorithm for detecting drowsiness-related lane departures by applying a random forest classifier to steering wheel angle data.

Although algorithms exist to detect and mitigate driver drowsiness, the high rate of false alarms and missed detection of drowsiness represent persistent challenges. Current algorithms use a variety of data sources, definitions of drowsiness, and machine learning approaches to detect drowsiness.

We develop a new approach for detecting drowsiness-related lane departures using steering wheel angle data that employ an ensemble definition of drowsiness and a random forest algorithm. Data collected from 72 participants driving the National Advanced Driving Simulator are used to train and evaluate the model. The model's performance was assessed relative to a commonly used algorithm, percentage eye closure (PERCLOS).

The random forest steering algorithm had a higher classification accuracy and area under the receiver operating characteristic curve than PERCLOS and had comparable positive predictive value. The algorithm succeeds at identifying two key scenarios associated with the drowsiness detection task. These two scenarios consist of instances when drivers depart their lane because they fail to modulate their steering behavior according to the demands of the simulated road and instances when drivers correctly modulate their steering behavior according to the demands of the road.

The random forest steering algorithm is a promising approach to detect driver drowsiness. The algorithm's ties to consequences of drowsy driving suggest that it can be easily paired with mitigation systems.
Body:No files listed
Copyright:None listed
Keywords:None listed

Bookmark and Share
Like us on Facebook!
Coypright © 2014 - The National Advanced Driving Simulator