How to mark out a construction site?

A construction site can be fixed or mobile, depending on whether its location is subject to movement during the day or not.

Companies undertaking work are therefore required to comply with safety standards throughout the project, by organizing clear marking of the construction site area.

Why mark out a construction site?

Marking out a construction site is primarily a matter of safety, helping to avoid hazards for road users and making it easier for workers to find their way around. For all types of construction sites, the work zone must include a building permit sign, in addition to warning tape depending on the location.

Construction sites on private land are not subject to specific regulations, but must be marked with a post and clear signage to ensure safety. Conversely, construction sites that encroach on public roads are subject to strict regulations, including a traffic order application, which is required for the installation of temporary signage. Marking posts indicate the new route to follow, and construction site barriers are placed around the work area.

Signage and markings allow:

• Ensure the safety of personnel and passers-by around the construction site,
• Ensure the smooth flow of traffic, by guiding road users towards the new route or the new configuration of the area,
• Reduce the number of accidents,
• Limit the risk of disputes with the community.

Construction site markings are only effective if they are clearly visible and clearly laid out, so that they can fully play their role of warning, guidance, and direction. The choice of sign posts must be based on several factors related to the construction site environment, such as traffic, the type of road, and the road's configuration.

What types of construction sites are affected by marking?

A construction site, by definition, involves the temporary installation of a set of machinery, materials, and personnel at a given location. The work undertaken inevitably brings about changes in the configuration of the site, as well as changes in the circulation of people or vehicles using the road in question. It is for this reason that any construction site occupying a public road in whole or in part must be signposted.

Thus, a fixed construction site that encroaches on the roadway requires an AKS sign, which is an approach sign, in addition to longitudinal and frontal position signs. A bevel may also be required in certain situations.

Conversely, a mobile construction site, which evolves in a progressive and continuous manner, requires the installation of a rotating beacon, associated with an AK5 panel with three R2 lights, and approach signaling by K1 pennant or by vehicle.

In all cases, temporary signage helps guide road users and construction site professionals, to protect them and ensure their safety.

Construction site signage can affect workers, vehicles, or the work itself. It must be implemented based on several factors, such as the type of road, its configuration, and the traffic density it carries.

Signs, people signs or markings must also be:

• Consistent with existing signage or floor markings,
• Updated regularly, to ensure that the indications are always justified and credible,
• Compliant with standards, with legible, well-positioned and well-indicated instructions,
• Visible to passers-by, through specific equipment for site workers.

It is therefore essential to choose the color of the panels, their size and the supports to be used, depending on the environment of the site.

Types of signs for a construction site

The signage for a construction site can be for approach, position or end of prescription.

Approach signaling

Approach signage is placed upstream of the construction site. Its purpose is to inform users of a nearby situation, warning them that they are entering a work zone. Generally, approach signage is composed of various elements such as:

• Construction cones,
• AK triangular signs with a yellow background, which indicate a danger, or that the road is narrowed,
• Signs prohibiting overtaking or parking, speed limits or mandatory direction of travel, called mandatory signs.

To install such signs, it is necessary to consult the regulations in force concerning the exact location, and to obtain a traffic order.

Position signaling

Position signs include signs that indicate a change of direction to road users, which can be either zebra signs or cones. In this case, it is necessary to retrace the new route in yellow.

This signaling can be in the form of:

• Markings to protect pedestrians, with a clear separation between the user route and the traffic lane,
• Safety signs warning pedestrians to change sidewalks if necessary,
• From a connecting bevel,
• From a frontal or longitudinal marking,
• From a PVC post,
• Of lane separators,
• Construction plots,
• Construction site barriers.

End of prescription signaling

The end of prescription signage is placed at the limit of the construction site, it indicates to users the end of a danger with clear indications.

According to the regulations, it is necessary to put up end-of-period signs 50 meters from the end-of-construction sign. End-of-period signs can be:

• A sign indicating the end of all prohibitions,
• A specific sign for a particular prohibition,
• A temporary sign indicating a new speed limit.

Reporting of special cases

Reporting of special cases includes:

• Specific signs for night work, often associated with a light warning, which concerns marking and position indication,
• Emergency signs, indicating an accident on the road, or the consequences of an intervention carried out on the road,
• Signs indicating temporary hazards, which require caution from users, without however hindering traffic. This could be, for example, a slippery road, the presence of gravel or a deformed road surface,
• Signs indicating temporary hazards blocking part of the road, such as an accident or landslide.

What are the possible ways to mark out a construction site?

Construction site marking can be done using temporary signs, traffic cones, construction tape, lane dividers, barriers, lighting devices or stakes.

Temporary signs are used to signal a work zone, improve visibility, and warn users of potential hazards or delays. The location and distance between signs vary depending on the location of the construction site.

Traffic cones are orange and white markers with reflective stripes that represent position signals and help demarcate the work zone upstream. Their role is to visualize the work zones or those that must not be crossed, to mark the route to follow and to demarcate the traffic lanes.

Warning tapes, such as barrier tape, help improve safety on construction sites. They can contain messages or red and white hatching. These tapes are practical and easy to use, as well as being strong and resistant to stress. They can be used both indoors and outdoors.

Lane dividers are used during long-term construction work, particularly to indicate that access to a road under construction is prohibited. The purpose of installing dividers is to prevent traffic from entering construction areas, and the presence of the two colors red and white ensures better visibility of the construction site on the road.

The red and white alignment markers are made of reinforced plastic and are easily identifiable on the road thanks to their height and distinctive shape. These markers can be used to signal traffic changes, lane closures, roadside works, lane hazards, or traffic changes. They are also used to mark construction sites on two-way roads or to provide central road markings. The alignment markers are mounted on a plastic base, ensuring their resistance to bad weather and traffic jams.

Nets and fencing are construction site marking tools made of plastic, which offer high visibility, as well as significant resistance to UV rays and tensile strength. They are an economical, quick, and easy-to-implement solution.

Safety barriers are used to secure construction sites, demarcate restricted areas or authorized pedestrian routes, and prevent vehicles from crossing the road. Barriers can be fixed, extendable, folding, or with a rail.

Red and white construction site stakes are used to mark work taking place on the verge of the road, or to signal an obstacle. They are placed directly on the ground and quickly demarcate a work area.

Construction site lighting signals ensure constant visibility in the construction area, day and night. These signals can take the form of work lights, lamps, illuminated triangles, or traffic lights. They also include signaling for intervention vehicles and equipment, in which case they take the form of light bars, rotating beacons, or spotlights.