Traffic fatalities and economic growth

Area of Science:

• Transportation Safety
• Economics
• Global Health

Background:

• Traffic fatalities represent a significant global health burden.
• Economic development influences road safety outcomes, but the exact relationship is complex.
• Forecasting future traffic trends is crucial for policy development.

Purpose of the Study:

• To analyze the relationship between per capita income and traffic fatality risk.
• To forecast global and regional traffic fatalities and motor vehicle stocks to 2020.
• To identify the income threshold at which traffic fatality risk declines.

Main Methods:

• Estimation of road death rate (fatalities/population) and its components using panel data (1963-1999) from 88 countries.
• Modeling fatalities per population (F/P), vehicles per population (V/P), and fatalities per vehicle (F/V) as spline functions of real per capita GDP.
• Incorporation of region-specific time trends and projection to 2020.

Main Results:

• The turning point for declining traffic fatality risk is identified at approximately $8,600 (1985 international dollars) per capita income.
• Motorization (V/P) increases with income but never declines; the decline in F/P is driven by a decreasing F/V.
• Global road deaths are projected to increase by 66% by 2020, with significant regional disparities.

Conclusions:

• Economic growth initially increases, then decreases, traffic fatality risk, with a threshold around $8,600 GDP per capita.
• High-income countries are projected to see a decline in fatalities, while China and India face substantial increases.
• Road death rates are expected to diverge, rising in developing countries and falling in high-income nations by 2020.