human factors, why and how do people misbehave
DESCRIPTION
Human Factors, why and how do people misbehave. Dr Ann Mills Head of Human Factors RSSB. Background. Approximately 6,500 level crossings Vary in terms of design and protection systems Two main categories: Active and Passive Active: Crossing user provided with warning - PowerPoint PPT PresentationTRANSCRIPT
Human Factors, why and how do people misbehave
Dr Ann Mills
Head of Human Factors
RSSB
Background
• Approximately 6,500 level crossings
• Vary in terms of design and protection systems
• Two main categories: Active and Passive
• Active: Crossing user provided with warning
• Passive: No warning is given
• Misuse, mechanical failure and error have the potential for resulting in crossing users being struck by trains
The UK perspective
36% of all train accident risk
Exploring human factors
Our approach to understanding human behaviour
Potential Causes of errors and Violations
An example
LX Risk Management toolkit
109 Human Factors Issues
73 Mitigation measures
16 Level crossing types
6 user types
Environmental influencing factors
• Sign obscured• Crossing instructions missing or unclear• Gate or barrier left open by previous user• Conspicuity of flashing lights• AHB – zig zagging behaviour
Behavioural influencing factors
• User believes he/she has enough time to beat the train
• User misjudges his/her speed and distance
• Time pressure
• Frustration at long waiting times
• Complacency
• Comprehension of signs
Sign comprehension
73% associated this with a level crossing
17% expected to see a barrier
60% associated this with a level crossing
38% expected to see a barrier
Behavioural influencing factors
• User believes he/she has enough time to beat the train• User misjudges his/her speed and distance• Time pressure• Frustration at long waiting times• Complacency• Comprehension of signs
• Failing to understand crossing instructions apply specifically to them
• User has low perception of risk
Education – a role to play?
Education identified as potential mitigation measure for 80% HF issues
Conclusions
• Errors and violations need equal consideration• Significant number of HF issues lead to
inappropriate user behaviour• Discussed Just 13 of 109 identified• Significance will depend on crossing and user type• Mitigations need to be appropriate to context and
level of risk• Education has important part to play
www.lxrmtk.com