Richard D. Powers
Eric W. Brooks
Unknown Author
John A. Blatnik
Brett Sposito
Dean Sicking
National Research Council (U.S.). Highway Research Board. Committee on Guardrails and Guide Posts.
New York (State). Dept. of Public Works. Bureau of Physical Research.
Alfred Böhringer
P. Smith
Organization for Economic Cooperation and Development. Crash Barrier Research Group.
Leonard Charles Pearson
Peter Ing
Jarvis Dale Michie
Stichting Wetenschappelijk Onderzoek Verkeersveiligheid.
Charles W. Yoder
Gordon G. Hayes