Deformable highway marker

A deformable roadway marker installation, comprising;

• a bore in the roadway pavement;
• a flexible, reslient plastic skirt portion of a rounded shape, having substantially vertical walls, positioned in the bore below the surface of the roadway, with the top of the walls generally flush with the surface of the roadway;
• a rounded dome-shaped deformable top of the same material, integrally molded with the skirt portion to form a unitary marker structure, said top being free of angled corners and sharp breaks, meeting the skirt portion walls at a peripheral edge generally flush with the roadway surface and extending above the roadway surface as a visible marker for traffic on the roadway, the top portion being of resilience and deformability such as to be readily deformable downwardly into the space encompassed by the skirt portion under the weight of a snowplow blade on the road;
• and
• grout means retaining the roadway marker in position and sealing its interior such that air is substantially prevented from escaping the interior;
• whereby the marker's top will deflect downwardly when struck by the blade of a snowplow and will quickly return to its original configuration, aided by the compression and re-expansion of the air in the interior.