Just published by New York City’s Department of Transportation is a comprehensive study and analysis of 20 years worth of cycling data. Adding to and reinforcing similar studies in other large North American cities, this study confirms both the “safety in numbers” effect as well as the risk reductions of well-designed cycling infrastructure.
The telling metric is “KSI” – the number of cyclists killed or severely injured in traffic. In a nutshell, cycling numbers grew by 162% while KSI dropped by nearly half. Said another way, the rate of KSI/100 million trips dropped from 1,072 to 292, a decline of 73%. Notably, only 11% of KSI occur on roads with cycling facilities.
The lessons learned in NYC add to the body of evidence showing that:
- the implementation of cycling facilities, especially protected facilities, dramatically reduces risks to those cycling.
- the the reduction of risk is both real and, more importantly, perceived, which in turn encourages large growth in cycling from the “interested but concerned” cohort.
- Higher numbers of people on bicycles induces a “safety in numbers” effect due to aggregate visibility and overall traffic calming.
Small cities simply don’t have the frequency of incidents and populations to do meaningful studies like this. Yet, we can learn from these lessons shown repeatedly in larger centres.