Key Terms

Barricade - As defined by OSHA, an obstruction designed to stop people or vehicles from entering a prohibited area.

Device - A sign, signal, marking, and other method used to control, warn, or guide the users of roadways passing through a roadway construction work zone.

Incident, accident, or collision - The terms used to describe an unintended impact by a vehicle against a person, a thing, or another vehicle.

Public roadway - A roadway that is open for use by the driving public. Some privately owned roadways are considered public roadways when they are open for use by the driving public.

Roadway - The strip of land over which a road passes. Roadways include bridges, overpasses, and other features that allow vehicles to travel in a continuous manner.

Signals - As defined by OSHA, moving signs designed to warn of possible or existing hazards. Signals may be provided by workers (such as flaggers), or by devices (such as flashing lights).

Signs - As defined by OSHA, hazard warnings that temporarily or permanently placed in locations where hazards exist.

Tags - As defined by OSHA, temporary signs designed to warn of existing or immediate hazards. Tags are usually attached to a piece of equipment or part of a structure.

Temporary traffic control, or TTC - The plans, methods, approaches, and actions taken to control and slow the movement of vehicles through a roadway construction work zone in order to ensure job site and motorist safety.

To learn more about Roadway Temporary Traffic Control visit our Construction Roadway Temporary Traffic Control Online Training web page.