Abstract

There is a need for a portable retroreflectometer which can perform reflectivity measurements in the field . This could eliminate the need for subjective ratings or taking samples of materials from the field to test in the laboratory. This report describes the development of a portable retroflectometer (PRR).

A PRR was built with the objective of approximating the angles of incidence and divergence used in the ESNA Reflex-Photometer (ESNA). Tests showed a good relationship between readings taken with the PRR and ESNA. The recommendation was made that the PRR is suitable for use as a means of measuring reflectivity in the field. However, the PRR should be used concurrently with subjective ratings and future modifications, with the objective of improving measurement consistency, are warranted.

Report Date

4-1-1983

Report Number

UKTRP-83-9

Digital Object Identifier

http://dx.doi.org/10.13023/KTC.RR.1983.09

Notes

The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky nor of the Kentucky Department of Highways. This report does not constitute a standard, specification, or regulation.

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