Base for roadway marker

A roadway marker comprises shell molded of suitable plastic and having an internal honeycomb configuration. A base plate extends over the lower surface of the shell covering the honeycomb arrangement and defining a plurality of chambers internal to the shell. The plate is provided with a plurality of apertures, each opening to a chamber. When the marker is installed, adhesive material flows through the apertures and into the chambers. Before the adhesive sets, it forms mushroomed-shaped configurations over the top inside surface of the plate. The mushroomed configurations create a strong mechanical bond between the plate and the associated roadway surface. The large lower surface area of the plate also enhances bonding of the marker to the roadway.

What is claimed is:

1. A roadway marker comprising:

a shell having an upper exposed surface, a lower surface portion and a central opening defined in said lower surface portion;

a plurality of ribs formed internal to said shell, said ribs being arranged to form discrete chambers within said shell;

a base plate connected to said shell and covering said ribs and said opening, said plate having a generally planar lower surface and a generally planar upper surface internal to said shell; and

a plurality of apertures formed through said plate, each aperture communicating with a chamber defined by said ribs;

wherein adhesive flows through said apertures and mushrooms above said upper surface of said plate within said chambers when said marker is adhered to a roadway surface.

2. The marker of claim 1 wherein said chambers define a honeycomb configuration.

3. The marker of claim 1 wherein said shell further includes bosses projecting downwardly of said shell for attachment of said base plate.

4. The marker of claim 3 wherein said base plate is provided with upwardly projecting strengthening ribs and said base plate ribs are configured to project into said shell in spaced relation to said bosses.

5. The marker of claim 2 wherein said lower surface of said plate and said lower surface portion of said shell are disposed in a common plane.

6. The marker of claim 1 wherein said ribs are formed integrally with said shell.

7. The marker of claim 1 wherein said base plate is provided with strengthening ribs extending vertically upward from said upper plate surface.

8. The marker of claim 7 wherein selective ribs of said shell and selective ribs of said base plate are mutually aligned and in abutment with one another to support said shell on said base plate.