Pavement marker for day and night visibility

Claim 1

A PAVEMENT MARKER FOR PROVIDING A MARKING ON A GENERALLY HORIZONTAL ROADWAY SURFACE, THE MARKING BEING VISIBLE FROM AN ONCOMING VEHICLE ON THE ROADWAY BOTH DURING THE DAY AND DURING THE NIGHT, SAID PAVEMENT MARKER COMPRISING: A BODY OF SYNTHETIC RESIN HAVING AT LEAST ONE PORTION PROVING A FACE LOCATED IN POSITION TO BE VIEWED FROM THE ONCOMING VEHICLE, SAID BODY PORTION HAVING; A FIRST PART WHICH IS OPAQUE, SAID FIRST PART PROVIDING A FIRST FACIAL PORTION CAPABLE OF BEING EFFECTIVELY VIEWED IN DAYLIGHT; AND A SECOND PART WHICH IS LIGHT TRANSMITTING AND HAS AN OUTER, OBVERSE LIGHT RECEIVING AND REFRACTING SURFACE, AN INNER, REVERSE LIGHT RECEIVING AND REFLECTING SURFACE, AND A RETRO-DIRECTIVE REFLECTING SYSTEM IN SAID REVERSE SURFACE FOR RECEIVING LIGHT EMANATING FROM THE ONCOMING VEHICLE AND INCIDENT UPON SAID OBVERSE FACE AND REFLECTING SUCH LIGHT GENERALLY PARALLEL TO THE DIRECTION OF INCIDENCE FOR RENDERING SAID SEOND PART REFLECTIVE AND PROVIDING A SECOND FACIAL PORTION CAPABLE OF BEING EFFECTIVELY VIEWED AT NIGHT, EACH OF SAID FIRST AND SECOND FACIAL PORTIONS BEING TO ORIENTED AS TO MAKE AN ACUTE ANGLE WITH THE HORIZONTAL AND TO RISE ABOVE THE ROADWAY SURFACE UPON WHICH THE PAVEMENT MARKER IS TO BE INSTALLED, EACH SAID ACUTE ANGLE BEING GREAT ENOUGH TO REDUCE DETERIORATION OF SAID FIRST AND SECOND FACIAL PORTIONS ARISING OUT OF CONTACT WITH THE ONCOMING VEHICLE WHILE BEING SMALL ENOUGH TO ALLOW ADEQUATE WIPING OF SAID FIRST AND SECOND FACIAL PORTIONS SUCH CONTACT; THE ACUTE ANGLE OF THE FIRST FACIAL PORTION BEING GREAT ENOUGH TO PROVIDE A SUFFICIENTLY LARGE PROJECTED VIEWABLE AREA; AND THE ACUTE ANGLE OF THE SECOND FACIAL PORTION BEING GREAT ENOUGH TO MAINTAIN ADEQUATE OPTICAL EFFECTIVENESS OF SAID RETRO-DIRECTIVE REFLECTING SYSTEM DURING SERVICE.