specifications for placing, maintaining, repairing, and removing temporary barrier systems. Temporary barrier system consists of: 1. New or undamaged used interconnected barrier segments 2. Segment connection hardware 3. Stakes and anchor bolts 12-3.20A(2) Definitions approach zone: Area immediately upstream of the work area and buffer space. clear area width: Minimum width throughout the length of the barrier system that must be maintained clear of obstructions, objects, and work resources during non-working hours. The width is measured perpendicular from the non-traffic side toe. departure zone: Area past the work area and the trailing end of the construction area. height differential: May be an excavation, a downward slope greater than 4:1, or a difference in elevation. The height differential is measured down from the top of pavement. set back distance: Space measured between the closest toe of temporary barrier and the edge of traveled way for each direction of traffic.
