Reflective pavement marker

Details Reflective pavement marker Reflective pavement marker

1975-09-10

1977-02-22

Byers, Jr., Nile C.

Road structure, process, or apparatus

Traffic director

Vibration inducing member

E01F 904

Patent

active

040089738

ABSTRACT:
A reflective pavement marker in the form of a marker button, such as a ceramic button, to be secured to a vehicle roadway with a given normally horizontal axis of the button aligned lengthwise of the roadway and having one or more reflectors each facing in one direction along the axis for reflecting light from the headlights of an approaching vehicle back toward the vehicle. Each reflector is recessed into the upper surface of the marker button in a manner such that vehicle wheels roll over the button without contacting and thereby optically degrading the reflector. Each reflector recess is bounded by an endwall facing along the button axis and mounting the reflector and a sidewall facing laterally of the axis, which walls extend to the outer perimeter of the button, whereby each recess has but a single interior corner and is open along the button perimeter between the walls to reduce the tendency of debris to collect in the recess and permit blowing of debris from the recess by the airstream of passing vehicles.

REFERENCES:
patent: 1927757 (1933-09-01), Ross
patent: 2065314 (1936-12-01), Johnson
patent: 2169674 (1939-08-01), Adas
patent: 2192878 (1940-03-01), Beebe
patent: 2245336 (1941-06-01), Hamilton
patent: 2337793 (1943-12-01), Abbott
patent: 3277800 (1966-10-01), Wiswell

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