| 摘要 |
SNOWPLOWABLE PAVEMENT MARKER A low-profile snowplowable pavement marker includes a base member generally cylindrical in outline and adapted to be installed in a drilled recess in the pavement, and having a support surface disposed in use below the level of the roadway surface for supporting thereon a cube corner reflex type reflector assembly partially recessed below the roadway surface, the top surface of the base member defining an inclined ramp rising from the roadway surface at one end of the base member toward and above the reflector assembly for protecting same from contact with snowplow blades. A monodirectional marker has an annular base with the reflector assembly mounted along a sector thereof and with arcuate ramps. A bidirectional marker has two part-annular end portions intersecting at and interconnected by a central portion carrying the reflector, and arcuate ramps converging upwardly toward the reflector from both ends of the marker. Another bidirectional marker is disc-like in shape with a flat central support surface flanked by aligned straight ramps converging upwardly from opposite ends of the marker. |
