communication is between the heating element 202 and the frame 112 in other embodiments the thermal communication is between the heating element 202 and the grate 114 in some embodiments the heating element 202 is a heat tape in certain embodiments the heat tape is water proof in other embodiments the heating element 202 is a wire which is optionally a coiled wire in some of these embodiments the wire is insulated so that there is no electrical connectivity with the environment to avoid accidentally delivering an electric shock to passersby in some embodiments the heating element 202 is also insulated to protect it from the elements for example water ice salt water for winter road conditions and or heat during the summer months the use of any heating element that converts electrical current to heat is contemplated in some embodiments the heating element 202 is embedded in the concrete slab 116 the heat from the heating element 202 is transferred by conductance through the concrete slab 116 to the frame 112 and the grate 114 in other embodiments the heating element 202 physically touches the frame 112 in other embodiments the frame 112 comprises a groove not shown into which the heating element 202 is placed the heating element 202 is in electrical communication with a power source 204 through wires 206 in embodiments where.