Supervisory Safety Practices in the Work-Related Driving Context Presenter: Dr Sharon Newnam...
Transcript of Supervisory Safety Practices in the Work-Related Driving Context Presenter: Dr Sharon Newnam...
Supervisory Safety Practices in the Work-Related Driving Context
Presenter: Dr Sharon Newnam Co-authors: Dr Ioni Lewis and Professor Barry Watson
Overview
• Research program
• Leadership intervention
• Broader safety intervention
Extent of the Problem
• Light vehicles
• Most common cause of injury and death in the workplace
• Highest fatalities of occupational groups
• Higher crash frequency than non-work related drivers
Theoretical development
• Individual and organisational predictors
• Supervisors play pivotal role in influencing safety outcomes
• Supervisory safety practices (SSP)– Frequency of safety-oriented interactions
The work-related driving context
• Limitations– Visibility– Collection of objective information – Appropriate feedback
• Safety-related interactions– Safe driving message – Safety reminder – Time management scheduling to avoid unsafe driving
Theoretical framework
• Integrated within the broader safety context
• Key factors influencing safety performance
– Perceptions of the safety climate – The quality of the exchange relationship
[Leader-Member Exchange (LMX] – Perceived role overload
Conceptual model
Supervisor Level
Safety climate perceptions
Driver level
Supervisory safety practices
LMX Self-report driving behavior
Role overload
Methodology• Longitudinal design
– Three month intervention (pre and post surveys)– 6 time points of monitoring SSP
• Multi-method design
– Supervisors (safety climate)– Drivers nested within supervisory workgroups– Community oriented nurses
Stages of data collection
Distribution of surveys
Time two: monitoring of supervisory safety practices
Distribution of surveysTime 1 Time 2 Time 3 Time 6Time 5Time 4
Time one Time three
Sample
• Community-oriented nurses
• Pre-intervention: 105 drivers matched to 22 supervisors
• Post-intervention: Supervisory safety practices matched to 85 drivers
• 61% of the sample was retained
Demographics
• Drivers – 90% female, 46 years old, 244 km/week
• Supervisors– 95% female, 8.5 years tenure in agency
Analyses
• H1 – Preacher and Hayes (2008) method for
testing the indirect effects in multiple mediator models
• H2/H3– Hierarchical linear modelling to test the cross-
level relationship and cross-level interaction
Results
Supervisor Level
Safety climate perceptions
Driver level
Supervisory safety practices
LMX Self-report driving behavior
Work overload
Interaction effects
Low climate High climate4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
Chart Title
Low overload
High overload
Safety climate
Superv
isory
safe
ty p
ract
ices
Conclusions• Quality of the exchange relationship and safe
driving behaviour– Drivers reciprocate valued behaviours based on the
attention given to SSP
• The influence of role overload on the safety climate SSP relationship– Acknowledge the role of supervisors in the safety
management of drivers– Deleterious effects of role overload
Mark your Diaries!
International Council on Alcohol, Drugs and Traffic Safety Conference (ICADTS T2013)
August 2013, Brisbane Convention and Exhibition Centre