Risk reducing measures as an essential part of risk management.

In 1990, the Ministries of Transport and for Housing, regional development and the environment in the Netherlands started the 'Risk Standardization Transport Hazardous Substances' project. The Transport Hazardous Substances Committee (CTGG) is a member of the reference group in that project. CTGG quantified the value of several risk reducing measures. Many of these measures are implemented in the transport of hazardous substances. Thanks to them the transport of hazardous substances is one of the safest activities taking place in the Netherlands. For example, it is dozens of times more safe than the transport of non-hazardous load. CTGG quantified the value of several risk reducing measurements to be divided into four main areas: (1) organizational, (2) technical, (3) infrastructural, and (4) regional development. Data needed for quantification were sampled by: (a) casuistics; (b) logical reasoning and calculation; (c) expert analysis; and (d) "the manager technique". CTGG considers these measures as an essential part of the evaluation of the remaining risks of the transport of hazardous substances. They could also be used in making other types of transport more safe. Follow-up of the measures can be guaranteed by assurance of safety by ISO 9002 certification with and a adjoining NEN 2726. This paper presents a survey of the CTGG investigation.