The objectives of this report were to investigate 1) the potential benefits of using flexible posts for post delineators and 2) the possibility of not requiring post delineators on sections of interstate-type highways where recessed markers are installed.
It is recommended that post delineators should only be used when the design curvature is 1.5 degrees or more, and the spacing should be based on the formula given in Table III – 1 of the MUTCD. Data obtained concerning the performance of flexible posts do not support widespread use at this time. A testing program should be developed to obtain an approved list of flexible posts and, after an evaluation period, expanded use of flexible posts might be recommended. Steel posts used as delineator posts should be lightweight (1.1 pounds per foot).
Digital Object Identifier
Agent, Kenneth R. and Pigman, Jerry G., "Use of Post Delineators on Interstates" (1986). Kentucky Transportation Center Research Report. 609.