The no-work zone between the work site and the barrier to the carriageway is used as a storage site for machinery and materials.

The work site is the area in which people work, and where machinery and materials are kept.

Traffic barriers are the strongest form of barrier and may be made up of steel barriers or concrete blocks linked together, for instance.

Mobile roadworks are roadworks taking place over a maximum of 3 days in a single location.

Barriers in the form of - for example - plastic containers filled with sand are the strongest form of barrier and can be used to replace traffic barriers.

Stationary roadworks are roadworks ongoing for more than 1 day in one and the same location.

The road area is only the area where vehicles travel. Cycle paths, pavements, paths, tunnels and suchlike do not form part of the road area as there are no particularly hazardous road users using these.

A protection module is a work zone which is protected at either end by a physical barrier such as a vehicle weighing at least 1500 kilos or a light arrow sign vehicle to prevent traffic from entering the site.

"Roadworks" include all work on, under, over or beside roads which impedes traffic movement in some way or which requires extra vigilance from road users.

The delimitation line is the line which indicates that the carriageway is narrowing due to roadworks.