Digital Commons Network^™

Evaluation Of Raised Pavement Markers In Kentucky: Statewide Installations; 1975-1979, Jerry G. Pigman, Kenneth R. Agent, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

Raised markers have become commonplace in delineation on highways in states where snowfall is minimal and snowplows are not needed. They have proven to be especially effective for wet, nighttime, and other poor visibility conditions when paint stripes are least effective. In Kentucky, over one million raised markers have been installed and damage from snowplowing has been significant during some of the more severe winters. As a result of costs associated with replacing damaged markers and requirements of the Pavement Marking Demonstration Program, an evaluation of all installations was undertaken.

Between 1975 and 1979, a total of 1,082,250 markers were …

Survey Of Lane Delineation Methods, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objective of this study was to summarize the nationwide experience pertaining to various lane delineation methods. The usage, cost, and problems associated with each alternative could then be analyzed for the purpose of determining an optimum marking program. A survey of the methods of lane delineation used across the United States was done by means of a questionnaire sent to each state. Responses were received from 46 states. Most of the information dealt with the following lane delineation methods: raised pavement markers, pavement tape, thermoplastic markings, and paint and beads.