The fundamental diagram, a macroscopic traffic flow model

Paper and shortened version presented to the OECD Symposium on Methods for determining geometric road design standards 1976, Helsingér, Denmark, 10-12 May 1976 Paper in: Symposium on Methods for determining geometric road design standards 1976, held at LO-Skolen, Helsingér, Denmark om 10th, 11th, 12th May 1996. Organisation for Economic Cooperation and Developmant, Paris 1976