Een snelheidsmeetnet ter ondersteuning van het verkeersveiligheidsbeleid : een overzicht van de ontwikkelingen tot nu toe. In opdracht van het Directoraat-Generaal Rijkswaterstaat, Adviesdienst Verkeer en Vervoer AVV.

The purpose of this study is to present a coherent overview of the possibilities of a speed measurement network to support road safety policy. Use has been made of those previous SWOV Institute for Road Safety Research reports which deal with measuring speeds and the design of provincial networks. Finally, the specification of network demands is dealt with.The purpose of this study is to present a coherent overview of the possibilities of a speed measurement network to support road safety policy. Use has been made of those previous SWOV reports which deal with measuring speeds and the design of provincial networks. Finally, the specification of network demands are dealt with. In order to shape a national and provincial speed policy, data is necessary. During the last ten years, SWOV has conducted many speed measurements using radar. This was commissioned by the Transport Research Centre of the Ministry of Transport, to support national policy. Simultaneously they commissioned SWOV, together with three provinces, to design a speed measurement network, using an inductive loop network, for national and provincial policy. Such a network must be able to provide information at any desired moment about traffic density, vehicle type, and speed by site and date/hour/minute. With this, national and provincial policy goals can be supported and monitored. At this moment in time, seven of the twelve provinces (in all four regions of the Netherlands; North, South, East, and West) have an inductive loop network, with which speeds are also measured. Data from radar measurements is not very comparable with that from inductive loops. Comparisons between measurements by radar with those made by inductive loops show that radar measurements give systematically lower speeds than inductive loops do. It is recommended that all provinces have a fixed network. The provincial network data must be aggregated to be able to provide a national picture. To achieve such aggregation, and to have mutually comparable data per province, it is necessary that data collection and processing are conducted uniformly. It is advised that methods be developed to be able to ‘recognize’ vehicles, using the inductive loop method. With this, it is possible to follow an individual vehicle along its route. (A)