title: Measurement of signal use and vehicle turns as indication of driver cognition.
abstract: This paper uses data analytics to provide a method for the measurement of a key driving task, turn signal usage as a measure of an automatic over-learned cognitive function drivers. The paper augments previously reported more complex executive function cognition measures by proposing an algorithm that analyzes dashboard video to detect turn indicator use with 100% accuracy without any false positives. The paper proposes two algorithms that determine the actual turns made on a trip. The first through analysis of GPS location traces for the vehicle, locating 73% of the turns made with a very low false positive rate of 3%. A second algorithm uses GIS tools to retroactively create turn by turn directions. Fusion of GIS and GPS information raises performance to 77%. The paper presents the algorithm required to measure signal use for actual turns by realigning the 0.2Hz GPS data, 30fps video and GIS turn events. The result is a measure that can be tracked over time and changes in the driver's performance can result in alerts to the driver, caregivers or clinicians as indication of cognitive change. A lack of decline can also be shared as reassurance.
authors.forename: Bruce
authors.initials: B
authors.lastname: Wallace
authors.forename: Rafik
authors.initials: R
authors.lastname: Goubran
authors.forename: Frank
authors.initials: F
authors.lastname: Knoefel
mesh_terms: D000465:Algorithms; D001334:Automobile Driving; D003071:Cognition; D003072:Cognition Disorders / Q000175:diagnosis*; D040362:Geographic Information Systems; D006801:Humans; D008297:Male; D008875:Middle Aged