Ontario Good Roads Association

Fall Issue Milestones Magazine_WEB

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Page 38 of 43

OGRA MILESTONES FALL 2017 / 39 do not have unlimited resources, and without actual incidents that result in fatalities, injuries, property damage, or police reports, it can be very difficult to collect enough data to identify high priority risk areas and understand the appropriate intervention needed. Surrogate Safety Analysis techniques attempt to shortcut that data collection cycle by identifying specific surrogate indicators that are highly correlated to risk of accidents and occur much more frequently than physical conflicts, but might otherwise not be reported through the traditional channels. To better understand the idea of surrogate indicators, we can look to the medical community. e Transportation Research Board's Subcommittee on Surrogate Measures of Safety discuss this analogy in their 2009 paper, "Surrogate Measures of Safety". Most people are familiar with the idea of using cholesterol to measure a person's risk of having a heart attack or heart disease. It is impractical to wait for people to have heart attacks to begin to treat their heart disease – by that point, it is often too late – which is why doctors look at cholesterol to monitor heart health and prevent more injurious or even fatal events from occurring in the future. Similarly, we can develop indicators that measure risky events that can be linked to likelihood of accidents occurring. By improving high risk intersections and stretches of road, we can reduce the rate of risky events, thereby preventing accidents and road fatalities. Additionally, these risky and unreported events happen at much greater frequency than unfortunate How Innovative Surrogate Safety Analysis Techniques Can Prevent Road Death & Injury

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