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Saifizul, A.A. and Yamanaka, H. and Karim, M.R. (2011) Empirical analysis of gross vehicle weight and free flow speed and consideration on its relation with differential speed limit. Accid Anal Prev, 43 (3). pp. 1068-1073. ISSN 0001-4575 , DOI https://doi.org/10.1016/j.aap.2010.12.013.
