In this project, experience was gained with the collection, processing and presentation of data with respect to road hazard on so-called 'A' and 'N' roads (motorways and arterial rural roads). Parts of the A and N road networks in the Netherlands were charted for three provinces. A distinction was made between four road types and two types of intersection. Information was offered on road safety, such as the average number of injury accidents: (1) per kilometre road length per year; (2) per million motor vehicle kilometres; (3) per year per intersection; and (4) per million motor vehicles passing a particular intersection. The scope and nature of road hazard on all A and N roads in the Netherlands was not established reliably with this small sample, taken during 1990. However, a comparison was made with the 1986 data, based on a previous and larger Dutch road network sample. This comparison allows a few trends to be defined for the development of road hazard per road type: (I) The risk seems to reduce on motorways, increase on arterial rural roads, and remain the same on roads with restricted access (for slow moving traffic); and (II) the severity of accidents seems to diminish on motorways and arterial rural roads, and rise on roads with restricted access.
Abstract