title: Driving performance changes of middle-aged experienced taxi drivers due to distraction tasks during unexpected situations.
abstract: This study investigated the effects of distraction taskssuch as sending a text message with a cellphone and searching navigation with car navigation system-on the driving performance of 29 highly experienced taxi drivers in their 50s. All participants were instructed to drive using a driving simulator for 2 min. while maintaining a constant distance from the vehicle in front and a constant speed. Participants drove without any distractions for the first minute. For an additional minute, they performed Driving Only or performed a task while driving (Driving + Sending Text Message or Driving + Searching Navigation). An unexpected situation, in which the participant had to stop abruptly due to a sudden stop of the preceding vehicle, occurred during this period. Driving performance during the unexpected situation was evaluated by car control variables, medial-lateral coefficient of variation and brake time, and by motion variables such as the jerk-cost function. Compared to Driving Only, jerk-cost function, medial-lateral coefficient of variation, and brake time increased during Driving + Sending Text Message or Driving + Searching Navigation.
authors.forename: Hyung-Sik
authors.initials: HS
authors.lastname: Kim
authors.forename: Mi-Hyun
authors.initials: MH
authors.lastname: Choi
authors.forename: Jin-Seung
authors.initials: JS
authors.lastname: Choi
authors.forename: Hyun-Joo
authors.initials: HJ
authors.lastname: Kim
authors.forename: Sang-Pyo
authors.initials: SP
authors.lastname: Hong
authors.forename: Jae-Hoon
authors.initials: JH
authors.lastname: Jun
authors.forename: Gye-Rae
authors.initials: GR
authors.lastname: Tack
authors.forename: Boseong
authors.initials: B
authors.lastname: Kim
authors.forename: Ung-Chan
authors.initials: UC
authors.lastname: Min
authors.forename: Dae-Woon
authors.initials: DW
authors.lastname: Lim
authors.forename: Soon-Cheol
authors.initials: SC
authors.lastname: Chung
mesh_terms: D000056:Accident Prevention; D001288:Attention; D001334:Automobile Driving; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011597:Psychomotor Performance; D011930:Reaction Time; D060145:Text Messaging