Specifications
About CTRE/ISU
The mission of the Center for Transportation Research and Education (CTRE) at Iowa State Uni-
versity is to develop and implement innovative methods, materials, and technologies for improv-
ing transportation effi ciency, safety, and reliability while improving the learning environment of
students, faculty, and staff in transportation-related fi elds.
Disclaimer Notice
The contents of this report refl ect the views of the authors, who are responsible for the facts
and the accuracy of the information presented herein. The opinions, fi ndings and conclusions
expressed in this publication are those of the authors and not necessarily those of the sponsors.
The sponsors assume no liability for the contents or use of the information contained in this
document. This report does not constitute a standard, specifi cation, or regulation.
The sponsors do not endorse products or manufacturers. Trademarks or manufacturers’ names
appear in this report only because they are considered essential to the objective of the document.
Non-discrimination Statement
Iowa State University does not discriminate on the basis of race, color, age, religion, national
origin, sexual orientation, gender identity, sex, marital status, disability, or status as a U.S.
veteran. Inquiries can be directed to the Director of Equal Opportunity and Diversity,
(515) 294-7612.