1C. Bennett and I. Greenwood, Modelling road user and environmental effects in HDM-4, The Highway Development and Management Series, Vol.7, PIARC,France, 2001.
2The World Bank, HDM-4 Road User Costs Model, Version 1.20, Washington D.C., 2007.
3Using the NZVOC Model to Prepare PEM Vehicle Operating Costs, Transfund, Data Collection Ltd., New Zealand, 2003.
4Design Manual for Roads and Bridges, Volume 13: Economic Assessment of Road Schemes, Section 1: The COBA Manual, Department for Transport, ScottishExecutive Development Department, Welsh Assembly Government/Llywodraeth Cynulliad Cymru, the Department for Regional Development, Northern Ireland,UK, 2002.
5G. Daniels, D. Ellis and Wm. Stockton, Techniques for manually estimating road user costs associated withconstruction projects, Texas Transportation Institute, USA, 1999.
6G. Daniels, W. R. Stockton and R. Hundley, Estimating road user costs associated with highway construction projects: simplified method, In Transportation ResearchRecord: Journal of the Transportation Research Board, No. 1732, Transportation Research Board of the National Academies, Washington, D.C., 2000, pp. 70-79.
7GEPA, Gestao de Pavimentos, Lda. Sistema de Gestao da Conservacao, Sistema de Custos dos Utentes. JAE - Contrato 4915, Lisboa, 1995.
8B. Santos, L. Picado-Santos and V. Cavaleiro, Vehicle operating, accident and user time costs in pavement management systems: Approach for Portugueseconditions, in: Proceedings of The Fifth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5),Utah, USA, 2007, pp. 205-210.
9B. Santos, Modelacao dos Custos dos Utentes na Gestao da Estrada (Modeling Road User Costs in Road Management), PhD Thesis (in Portuguese), University ofBeira Interior, Portugal, 2007.
10B. Santos, L. Picado-Santos and V. Cavaleiro, Definition, analysis and application of a simplified road user costs model for Portuguese trunk roads, Proceedings of the 11 thInternational Conference on Asphalt Pavements- ISAP2010, Nagoya, Japan, l-6th August, 2010.