A portable roadway warning device includes a core having a plurality of weights embedded in a polymeric material, wherein the weights have a greater density than the polymeric material, and a housing having opposite first and second side surfaces, a leading edge, a trailing edge, and an upper vehicle interface surface. The housing covers the core. The leading and trailing edges define a distance D therebetween, wherein each of the weights has a maximum lengthwise less than D. A first connector member extends outwardly from the first side surface, and a second connector member extends outwardly from the second side surface. An assembly of roadway warning devices, and methods of installing and manufacturing such devices, are also provided.

A portable roadway warning device includes a core having a plurality of weights embedded in a polymeric material, wherein the weights have a greater density than the polymeric material, and a housing having opposite first and second side surfaces, a leading edge, a trailing edge, and an upper vehicle interface surface. The housing covers the core. The leading and trailing edges define a distance D therebetween, wherein each of the weights has a maximum lengthwise less than D. A first connector member extends outwardly from the first side surface, and a second connector member extends outwardly from the second side surface. An assembly of roadway warning devices, and methods of installing and manufacturing such devices, are also provided.

A retractable speed barrier system includes a winged speed barrier assembly, a lateral pivoting assembly that includes a plurality of trapezoidal hinges, a hollow frame assembly, and an electrically activated linear actuator. The winged speed barrier assembly is attached to the hollow frame assembly by the lateral pivoting assembly. The linear actuator causes the winged speed barrier assembly to laterally pivot on the trapezoidal hinges in a direction perpendicular to the flow of traffic between a retracted position and a deployed position.

A handheld warning sign including front and back with at least one side having a predetermined color and warning information printed on the sign. A handle member is fastened to the bottom of the sign enabling it to be handheld. A longer pole extension structure can be attached to sign handle member enabling it to extend to the ground allowing the sign to be a pole sign. An electronic sound device is positioned within the handle of the sign and connected to a battery and a off and on power switch. Wireless LED lights are attached to the sign and when the electronic sound device button is pushed it activates both the electronic sound and the lights. The electronic sound device produces electronic warning sounds and the warning lights flash to attract the attention of motorists or pedestrians to safely follow the directions of the safety personnel.

A retractable speed barrier system includes a winged speed barrier assembly, a lateral pivoting assembly that includes a plurality of trapezoidal hinges, a hollow frame assembly, and an electrically activated linear actuator. The winged speed barrier assembly is attached to the hollow frame assembly by the lateral pivoting assembly. The linear actuator causes the winged speed barrier assembly to laterally pivot on the trapezoidal hinges in a direction perpendicular to the flow of traffic between a retracted position and a deployed position.