Exciting new research. Please read this Forbes article (link below) that points to a new AAA Foundation study on Vehicle Speed and a Pedestrian’s Risk of Severe Injury or Death. This study updates the well-known research from Great Britain and quantifies the increased vulnerability of older pedestrians. The best part, the AAA Foundation calls for traffic calming in urban areas.
Forbes article http://www.forbes.com/sites/tanyamohn/2011/09/30/low-driving-speed-can-cause-serious-pedestrian-injury-and-death-report-finds/
AAA Foundation Report http://www.aaafoundation.org/pdf/2011PedestrianRiskVsSpeed.pdf