FINAL REPORT 523
Louis F. Cohn and Roswell A. Harris
The Technology Group
16810 Homestead Trace
Fisherville, KY 40023
Arizona Department of Transportation
206 South 17th Avenue
Phoenix, Arizona 85007
in cooperation with
U.S. Department of Transportation
Federal Highway Administration
The contents of the report reflect the views of the authors who are responsible for the
facts and the accuracy of the data presented herein. The contents do not necessarily
reflect the official views or policies of the Arizona Department of Transportation or the
Federal Highway Administration. This report does not constitute a standard,
specification, or regulation. Trade or manufacturers' names which may appear herein are
cited only because they are considered essential to the objectives of the report. The U.S.
Government and The State of Arizona do not endorse products or manufactur
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