d988464e_ng_and_Guides___FHWA_Work_Zone_es_Documents__Listed_by_Title__Description
[Title] Work Zone Positive Protection Toolbox View document [Format] Online [Length] 20 pages [Provider] ATSSA [Cost] Free [Target Audience] Those who work in or near traffic control work areas, and those who design temporary traffic control plans [Description] 
Describes the various types of positive protection devices currently in use and provides guidance on where and how each device is typically used.
Traffic Control in Work Zones - Work Zone Training and Guides - FHWA Work Zone
Description