Moreover, occupant protection can be enhanced by the further development of seat belts and airbags, e.g. through force-limiting features which control the maximum restraining force exerted by the shoulder belt. Other technological advances that are likely to be relevant for older occupants are: Intelligent restraint systems that adjust for lighter, older occupants, dual-stage airbags to minimise airbag impact in moderate crashes, head restraints to minimise soft tissue injury and whiplash injuries to the neck, side airbags to protect head and chest in side collisions, such as crashes when turning left (in right-hand traffic) or right (in left-hand traffic, DfT, 2009). The concept targets older people in Salzburg (60 to 100 years old) who represent approximately 33% of the city’s bus users.