The development of HDM-4 wouldn’t have been possible without the significant contributions (financial and intellectual) of a large number of countries, organisations and individuals. It is difficult to establish a comprehensive list; we apologize to those whose name has been omitted.

Donors

• HDM-4 version 1: Asian Development Bank, Denmark, FHWA (USA), Finland, France, Japan, Madagascar, Malaysia, PIARC, Swedish National Road Administration (SNRA), United Kingdom Overseas Development Administration (ODA), the World Bank
• HDM-4 version2: Australia, Canada-Quebec, France, Japan, Latvia, New Zealand, Norway, Portugal, Switzerland, Tanzania, UK (DFID) and the Asian Development Bank

Management

• At the World Bank: C. Harral, C. Hoban, M. Juhel, W. Paterson, A. Pellegrini, R. Scurfield,
• At the World Road Association (PIARC), the Secretaries General: B. Fauveau (1995-1998), J.-F. Coste (1998-2002), J.-F. Corté (2002-2014). N. Robertson project coordinator (1998-2002), P. Joubert and A. Caroca, associate project coordinators, Raimo Tapio (FinnRA) as Chair of the PIARC HDM-4 project Committee
• At the University of Birmingham, ISOHDM Project Secretariat at the Highways Management Research Group (HiMaRG) led by H. Kerali (till 2002) then M. Snaith.
• For the HDMGlobal consortium comprising the following partners -the University of Birmingham, Scott Wilson Kirkpatrick & Co. Ltd, WS Atkins, ARRB Group Ltd, Ponts Formation Edition, Instituto Chilano Del Cemento Y Del Hormigon, Scetauroute International and TRL Ltd: M. Snaith, R. Mesnard with the Chief Executive Officer, E. E. Stannard.

System design and software development

• At the University of Birmingham: H. Kerali, J.B. Odoki, E. E. Stannard, D. C. Wightman

Development and calibration of models and drafting of the documentation

• ARRB, FinnRA, N D Lea International Limited based at the Road “Research Institute in Malaysia (IKRAM), TRRL
• S. W. Abaynayaka, C. R. Bennett, J. B. Cox, I. G Greenwood, U. Hammerstrom, H. Hide, H. Kerali, V. Mannisto, G. Morosiuk, J. B. Odoki, W. D. Paterson, M. J. Riley, R. Robinson, D. C. Wightman, E. E. Stannard, T. Toole, D. McMullen, P. Yuli.

Acceptance testing

• Organized and led by P. Joubert with the inputs from R. Archondo Callao, A. Caroca, , I. Cossens, J. Favaloro, L. Kannemeyer, N. Robertson, A. Spernol, J. Weligamage, J. Yeaman.

Translation of the software and documentation

• French version, at the Laboratoire Central des Ponts et Chaussées: P. Joubert
• Spanish version, at the Instituto Mexicano de Transporte: R. Solorio, R. Hernandez, J. Bustamante