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Page 60 of the Rice Signs 2017 Traffic Safety Catalog covers heavy traffic-control barriers — the final page in the Work Zone Safety section. Water-filled Barriers (A-Walk and B-Wave models) are large plastic barriers that fill with water on-site to provide ballast equivalent to concrete jersey barriers without the weight during transport — they include SKAR W/RV crash-rated configurations in 8 by 3 inch and 6 by 4 inch footprint dimensions. Impact Attenuators (also called Crash Dissipators) are sand-filled canister arrays placed in front of fixed roadside hazards (bridge piers, gore points, exit ramp dividers) to absorb the energy of an errant vehicle. Longitudinal Channelizer Barriers create continuous lateral separation along long-duration work zones — typically chained together end-to-end to form a wall.