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.
Digital Object Identifier
Agent, Kenneth R. and Pigman, Jerry G., "Development of a Portable Retroreflectometer" (1983). Kentucky Transportation Center Research Report. 968.