3m Innovative Properties Company

Warren J Johnson

David C May

David Jon Lundin

Cristina U Thomas

Ronald W Gerdes

Larry K Stump

Sithya S Khieu

Dale H Haunschild

James H Harper

Terrence W Miller

Neil A Hodson

Roberta M Collins Harper

A pavement marker has an unpotted upper shell and a lower base plate that together define a housing. A number of ribs are disposed in the housing interior oriented substantially perpendicular to the inner wall of the base plate. The upper shell has inclined end faces, an upper face, and is made of a plastic material having moderate to high flexural modulus and a high impact strength. The lower base plate has a planar inner wall and an opposed planar, pavement-engaging outer wall, and is made of a material having a Young's modulus of at least approximately 300,000 PSI (20.7.times.10.sup.8 Pascal). The ribs are formed unitarily with the inner wall of either the upper shell or the base plate, and extend upwardly from the inner wall of the base plate to the inner wall of the shell. A retroreflective lens is positioned on at least one of the first and second opposed side faces of the marker. The pavement marker resists delamination from a roadway surface when secured to the road with a soft adhesive.

Raised retroreflective pavement marker

A pavement marking tape having a scrim, wherein the scrim is extensible to enable the tape to conform to irregularities in a road surface, and thereby bond more securely to that surface.

Pavement marking tape

Growing community of inventors

Hudson, WI, United States of America

Warren J Johnson