In the US, unintentional injury is the leading cause of death
among children and adolescents, accounting for nearly 50% of deaths
among 5- to 14-year olds [5]. Each year, nearly 325,000 children visit
the emergency department for bicycle-related injuries and there are
over 26,000 associated traumatic brain injuries [6]. In 2011, the
National Highway and Traffic Safety Administration reported over
17,000 bicycle-related injuries and 116 fatalities among those
b20 years old [4]. Both the financial and non-monetary cost to
society cannot be understated.