injury potential
Why concrete step barrier
has a lower potential for injury.
EN 1317, the European Standard for road restraint systems, details a number of different measures for ranking the severity of an impact with a crash barrier.
One such method is Acceleration Severity Index or ASI. But ASI is thought by many experts to be unreliable. The limits that form part of the ASI were originally developed for use with military aircraft ejector seats and were based on car occupants wearing only a lap seat belt.
