The RPM cats eye delineators are used in highway centerlines and edge lines as a traffic safety measure to provide more positive guidance for motorists in inclement, stormy, sever, rough and bad weather having low light conditions. These devices are being used throughout the world now by most of the traffic and highway agencies. Improved delineation of the centerline by RPMs at night and the consequent movement away from the centerline will reduce head-on crashes at night. RPM cats eye delineators are very easy to install.