Protection Services offers a wide variety of traffic channelizers for the work zone environment. All PSI channelizers are NCHRP 350 approved so you can order with confidence. PSI plastic drums feature an anti-roll design, lock-on base, choice of base style and weight, up to two barricade lights, a built in handle, and are stackable for easy transport. PSI drums come pre-striped in 4 or 6 inch reflective sheeting to meet your state`s specification.