Citation

Zhang H, Qian D, Yang X, Shao C. J. Transp. Saf. Secur. 2019; 11(5): 520-543.

Copyright

(Copyright © 2019, Southeastern Transportation Center, and Beijing Jiaotong University, Publisher Informa - Taylor and Francis Group)

DOI

10.1080/19439962.2018.1436106

PMID

unavailable

Abstract

The widespread use of speech-based texting while driving has become a common phenomenon. However, there are few studies directly researching on the impacts of speech-based texting on driving performance. The objective of this study is to investigate the impacts of speech-based texting on drivers' braking behavior. Forty-seven valid participants drove a high-fidelity driving simulator in a car-following scenario using speech-based texting as well as two other conditions: hands-free phone conversation and baseline (no secondary task). The Weibull accelerated failure time (AFT) model and the Lognormal AFT model were developed for the brake reaction time (BRT) in the brake reaction stage and the speed reduction time (SRT) in the deceleration stage, respectively. The developed models showed that vehicle dynamic variables, mobile phone use conditions, and self-reported frequency of mobile phones use while driving had statistically significant effects on BRT and SRT. Compared to the baseline, hands-free phone conversation and speech-based texting caused a 33.4% and 46.7% increment in the BRT, and an 8.7% and 15.4% decrement in the SRT. The results indicated that the speech-based texting task is more dangerous than the hands-free phone conversation task. These findings demonstrated that speech-based texting while driving was very harmful to driving performance and should be banned.

Language: en

Keywords

brake reaction time (BRT); braking behavior; driving simulator; parametric duration model; speech-based texting; speed reduction time (SRT)