The proceedings contain the following papers: Road traffic information within the framework of national traffic and transport accounts in the netherlands (Goslinga, J.D.); Use and requirement of traffic data (Kaartama, M.); Measuring traffic flow on a road network (Devlin, J. and McGuinness, P.); Methods for traffic counting in France (Ledru, M.); National traffic censuses in Great Britain (Dale, H.M. and Allnutt, D.E.); The national traffic census of Spain (Allue, C.G. and Gardeta Oliveros, J.G.); Road traffic census 1978 for the Federal Republic of Germany (Brunsch, H.); Traffic surveys - traffic counts (Alberucci, E. and Cialdini, P.); Survey of flow parameters and vehicle weights (Treglia, P.F., Boccassini, S. and Olivotto, P.); Equipment for data acquisition (di Carlo, C.); Estimation of ADT from periodic traffic counts (Bak, K.); Traffic counting equipment in France (Ledru, M.); A new series of traffic counting and data logging equipment (Klijnhout, J.J.); General purpose data logging equipment and data retrieval systems used in road traffic studies, road inventory studies and management of road maintenance (Skarra, N.); An automatic method to count and classify road vehicles (Moore, R.C.); Automatic traffic data retrieval (Evans, D.); A new microwave beam counter (Ylinen, J.); Tests with `piezo-electric' detectors in France (Ellenburg, M.); Automatic recording of axle-load in Denmark 1967-1980 (Banke, J.); Management of automatic traffic counting (Mathews, D.H.). For abstracts of papers by Moore, R.C. and Mathews, D.H. see IRRD Nos 267450 and 267451. The proceedings includes French language texts of the papers by Ledru, M. and Ellenburg, M.
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