TRAFFIC-LINE Chapter 8 Works Barrier | HDPETRAFFIC LINE Works Barrier HDPE TRAFFIC LINE Works Barrier HDPE are manufactured in HDPE material which is UV resistant, and is coloured bright orange with red white reflective panels which makes them highly visible in day or night conditions. The Barriers can be connected to each other by a hook and eye system, which makes them very adaptable for use on uneven ground. The Barriers are lightweight but stable incorporating non trip feet that swivel 360