Barrier cable is a vehicular or pedestrian restraint system used in parking garages.
The steel strand is Zinc plated to protect it from corrosion per ASTM A475.
Plastic-Coated is similar to the steel tendon used in Unbonded post-tensioned concrete.
The only difference is that plastic-coated barrier cable does not have a layer of Post Tension coating ("grease") between the extruded HDPE plastic sheathing and the steel strand.
[3] 7-wire Barrier Cable has a high strength-to-weight ratio of the strands and the cables cost less to place than precast panels, traditional cast-in-place or concrete masonry barriers.