Project Overview Conclusions (Work in Progress ...

A New Model for Human Behavioural Adaptation in Distracted Driving Oscar Oviedo-Trespalacios (Ph.D. candidate), Md. Mazharul Haque, Mark King & Simon Washington

Project Overview Larger Headways

• Mobile phone tasks impair driving behaviour. • While engaging in a dual task, drivers are able to prioritize the driving task over use of the mobile phone. • Behavioural adaptation theory, in the context of mobile phone usage, assumes a broader view of behavioural changes ranging from a reduced to increased safety effect. So, do drivers adapt their behaviour? Or are drivers compensating for risk? And does it have safety implications?

Baseline + Distraction

Slower Speed

Common Impairments Due to Distraction

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Methodology Phase

Aim

Methods

Phase 1

Model definition and gap analysis using human-machine systems

Literature Review

Phase 2

Behavioural Adaptation Theory testing

Simulator Experiment No. 1

Phase 3

Phase 4

Behavioural Adaptation Model refinement New behavioural with Risk adaptation model Homeostasis and testing Task-Capability Interface Theory Cross-sectional study

Simulator Experiment No. 2

(i) Cluster analysis (i) Seemingly and Factorial Unrelated analysis Regression Equations Phase 1 (ii) Generalized (SURE) Systematic ordered probit model • Mobile phone distracted driving was modelled as a Analysis and review (ii) Hierarchical (iii) Mixed coefficients To be defined and regression trees Evaluation human-machine system. Ordered Probit model meta-analysis (iii) Generalized linear with panel data Human-Machine mixed model repeated (iv) Structural measures System Equation Modelling analysis (GLMMRM) (SEM)

Behavioural Adaptation Theory 1. Driver Characteristics 2. Secondary task demand 3. Driving task demand

Risk Allostasis Theory Feeling of Risk

Proposed Theoretical Model

+/- Safety Strategic and Tactical Control

Mobile Phone Distracted Driving (Operational Control) +/- Mobile Phone Task Performance

+/- Driving Task Performance

+/- System Performance (Functionality, Quality, Reliability, and Occupancy)

Conclusions (Work in Progress) Phase 2 • Behavioural adaptation theory was calibrated for speed selection behaviour. Behavioural Adaptation Theory

• Speed adaptation is the difference in speed deviation from the speed limit between phone and baseline conditions. • In the simulator study, drivers selected a lower speed while having mobile phone conversations. • The execution of in-vehicle tasks results in a two• The results have confirmed that road traffic way interaction between driving and using mobile complexity (e.g. heavy traffic), secondary task phones. demands (e.g. perceived auditory workload), and • Distracted driving influences safety, quality and driver characteristics (e.g. Attitudes) influence resiliency of the transport system. speed selection behaviour.