How Do Drivers Respond to Silent Automation Failures? Driving Simulator Study and Comparison of Computational Driver Braking Models

Giulio Bianchi Piccinini, Esko Lehtonen, Fabio Forcolin, Johan Engström, Deike Albers, Gustav Markkula, Johan Lodin, Jesper Sandin

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

Objective: This paper aims to describe and test novel computational driver models, predicting drivers’ brake reaction times (BRTs) to different levels of lead vehicle braking, during driving with cruise control (CC) and during silent failures of adaptive cruise control (ACC). Background: Validated computational models predicting BRTs to silent failures of automation are lacking but are important for assessing the safety benefits of automated driving. Method: Two alternative models of driver response to silent ACC failures are proposed: a looming prediction model, assuming that drivers embody a generative model of ACC, and a lower gain model, assuming that drivers’ arousal decreases due to monitoring of the automated system. Predictions of BRTs issued by the models were tested using a driving simulator study. Results: The driving simulator study confirmed the predictions of the models: (a) BRTs were significantly shorter with an increase in kinematic criticality, both during driving with CC and during driving with ACC; (b) BRTs were significantly delayed when driving with ACC compared with driving with CC. However, the predicted BRTs were longer than the ones observed, entailing a fitting of the models to the data from the study. Conclusion: Both the looming prediction model and the lower gain model predict well the BRTs for the ACC driving condition. However, the looming prediction model has the advantage of being able to predict average BRTs using the exact same parameters as the model fitted to the CC driving data. Application: Knowledge resulting from this research can be helpful for assessing the safety benefits of automated driving.

Original languageEnglish
Pages (from-to)1212-1229
Number of pages18
JournalHuman Factors
Volume62
Issue number7
DOIs
Publication statusPublished - 1 Nov 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • adaptive cruise control
  • autonomous driving
  • cruise control
  • driver models
  • visual looming

Fingerprint

Dive into the research topics of 'How Do Drivers Respond to Silent Automation Failures? Driving Simulator Study and Comparison of Computational Driver Braking Models'. Together they form a unique fingerprint.

Cite this