Patent ID: 6887011
Filing Date: 2005-05-03
Classification: E01F

Abstract:
1. A roadway marker comprising a resin base having a bottom for mounting to a supporting surface and a front lens recess having a bottom edge substantially adjacent the bottom of the base and a top edge spaced rearwardly from the bottom edge so that the front lens recess is sloped at an acute angle relative to the bottom of the base, the front lens recess being formed with a plurality of grooves, a resin lens having a rear surface secured to the front lens recess of the base, the lens including at least one nighttime signal region with a plurality of retroreflective surfaces aligned for reflecting light from a headlight of a vehicle back toward the vehicle, the rear surface of the lens further being formed with a plurality of ribs nested in the grooves of the front lens recess and ultrasonically welded to the base so that the nested ribs and grooves define an integral matrix of resin, the resins of the lens and the base being formed from a resin having a fluorescent material therein such that ambient light impinging on the fluorescent material causes photons to be emitted through portions of the base ultrasonically welded to the lens and further emitted through the lens to define daytime signal regions on the lens.