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Haddon's model for traffic-related injuries


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The American physician and founding director of the National Transportation and Safety Commission, William Haddon (1926–1985) analyzed the factors responsible for traffic-related injury. In 1963, he produced a model of three phases (before, during, and after injury occurred), and the human, vehicle-related, and environmental factors that were associated with the injury. He presented these in what became known as Haddon's matrix, shown below.

Haddon's model

Environmental Factors

Haddon's model

Human Factors

Vehicle Factors

Physical

Socio-economic

Pre-injury Phase

Alcohol

Unstable

Poor visibility

Ignorance

Injury Phase

Resistance to injury

Hard, sharp surface material

Flammable

Lack of enforcement

Post-injury Phase

Existing conditions

Rapid deceleration

Emergency medical response

Lack of funding for care and rehab

Subjects: Public Health and Epidemiology.


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