held in place by thermal bonding and grooves 15 which run the length of the plastic lower leg components 5 the rubber component 14 forms a protective void keeping water and debris from entering into the area that the upper legs 3 flex into in the preferred embodiment ribbing spaces 17 are formed in the lower legs 5 and serve to provide compressive strength and also a large undercut volume for the epoxy to flow into this strong mechanical bond is a substantial improvement in retention safety versus the purely chemical bond on common steel markers 0032 fig4 f and 4g illustrate the novel way that the upper legs 3 are joined with the lower legs 5 equal sized notches 19 are molded into each of connections between an upper leg 3 and a lower leg 5 which surrounds a centralized circular common section 21 during manufacture this entire area including the circular common section 21 becomes filled with rubber and in effect forms a torsion spring holding the reflector 1 in its normal position when depressed by a tire or snowplow blade 47 the natural position of the rubber forces the two leg components 3 back to the normal position this occurs due to the rubber filling the notches 19 and the circular common section 21 when the pavement marker 2 is depressed the rubber cores 23 act as a resilient torsional spring applying pressure via the notches 19 to return the marker 2 to its raised position there are positive mechanical stops in both positions resulting from the molded geometry of the plastic parts the perspective views.