Modular travel warning strip system and methods
A modular highway warning strip system which comprises a modular warning strip segment having first and second ends, a length extending between the first and second ends, two opposing lengthwise sides, a width extending between the opposing lengthwise sides of the segment, top and bottom surfaces, and a thickness. Each of the first and second ends comprise at least one male protrusion and at least one female receptacle, wherein the at least one male protrusion is configured to engage the at least one female receptacle for joining a plurality of the segments together end-to-end. A segmented metallic plate is disposed between upper and lower rubber layers, the segmented plate comprising a plurality of segments separated by slits comprising living hinges.
1. A method of making a modular highway warning strip, comprising:
fabricating a segmented metallic plate by cutting a grid of slits lengthwise and widthwise across the plate to form a plurality of segments separated by and defined by said slits;
forming a plurality of holes across a surface of the segmented plate which extend through a thickness of the plate;
laying a first layer of rubber in a compression mold;
placing the segmented metallic plate over the first layer of rubber;
laying a second layer of rubber atop the metallic plate;
applying heat to the mold, sufficient to liquefy the rubber layers, so that rubber flows through the holes formed in the segmented plate and into the slits in the segmented plate; and
removing the molded modular highway warning strip from the mold.
2. The method as recited in claim 1 , wherein the grid of slits are cut using a laser cutter.
3. The method as recited in claim 1 , wherein the fabricating step further comprises forming the plate to be about 9 inches wide.
4. The method as recited in claim 1 , wherein each of said plurality of segments are formed to be about 4 inches long and 3 inches wide.
5. The method as recited in claim 1 , wherein the slits are 0.005- 1/16 inches in width.
6. The method as recited in claim 1 , wherein the slits have a depth less than the thickness of the plate.
7. The method as recited in claim 1 , wherein the slits extend entirely through the thickness of the plate.
8. The method as recited in claim 7 , wherein the step of forming the plurality of segments further comprises forming a plurality of lands comprised of metal extending across a width of each slit from one segment to an adjacent segment, the plurality of lands being in spaced relationship to one another.
9. The method as recited in claim 1 , wherein the step of forming a plurality of holes further comprises forming at least one hole in each of a plurality of the segments.
10. The method as recited in claim 1 , wherein the step of fabricating a segmented metallic plate further comprises forming a handle hole in the plate.
11. The method as recited in claim 1 , wherein each of the plurality of holes has a diameter of ¾ inch.
12. The method as recited in claim 1 , wherein the step of fabricating a segmented metallic plate further comprises forming a male protrusion at a first end of the plate and a female receptacle at a second end of the plate.
13. The method as recited in claim 1 , wherein the step of laying a first layer of rubber in a compression mold comprises laying the first layer of rubber over a plurality of locating pins so that the locating pins protrude upwardly through a top surface of the first layer of rubber.
14. The method as recited in claim 1 , wherein the step of placing the segmented metallic plate over the first layer of rubber further comprises ensuring that the locating pins extend through locating pin holes formed in the metallic plate.
15. The method as recited in claim 1 , wherein the thickness of the segmented plate is about 5/16 inches.