moreover occupant protection can be enhanced by the further development of seat belts and airbags eg through forcelimiting 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 dualstage 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 righthand traffic or right in lefthand traffic dft the concept targets older people in salzburg to years old who represent approximately of the city s bus users