This 2002 study covered drinking and driving, seat belt and child restraint use, local infrastructure improvements on urban and minor rural roads, and safety on main interurban roads. The thinking is based on a road safety target hierarchy of the final outcomes (the number killed and injured), intermediate outcomes (Safety Performance Indicators), safety programmes and measures, and “structure and culture” as shown in Figure 4.5. This approach is adapted from a consultation document on a road safety strategy in New Zealand (LTSA, 2000).