Earl Swift
Richard O. Baumbach
Finland.
Simon Ofori Ametepey
United States. Congress. Senate. Committee on Environment and Public Works.
Ghazi Gaseem Al-Khateeb
United States. Federal Highway Administration.
Iain Sinclair
Len Beadell
California. Division of Highways
Unknown Author
International Road Federation.
Ralf Risser
Edward Weiner
France
Thomas Radford Agg
Babette Cole
M. G. Lay
Run Liu