Knowledge base
SB250: What is compliant construction site signage and why is it important?
SB250 is Standaardbestek 250 for road construction: the technical standard with which temporary construction site signage must comply in terms of dimensions, retroreflectivity and colour. It is directly binding on you when it has been declared applicable to your contract; on a standard roadworks site, the highway code and the Ministerial Decree of 7 May 1999 apply. All our equipment complies with SB250.
"In accordance with SB250" appears on just about every quote for construction site signage, but what exactly does it mean, and when does it actually bind you? Here’s a brief explanation.
What is SB250?
SB250 is Standaardbestek 250 for road construction, published by the Flemish Government. Among other things, it sets out the requirements that temporary traffic and construction site signage must meet: dimensions, retroreflectivity (visibility at night), colour fastness and the method of installation. This ensures that your site remains clearly visible even in the dark and in bad weather.
When does the SB250 come into effect?
Specifications are a contractual document, not a law. SB250 applies to you when it has been declared applicable in your contract, typically when working for a road authority such as the Agentschap Wegen en Verkeer, or when a municipality refers to it in its licence conditions.
If you are carrying out a private renovation on a local council road, Article 78 of the highway code and the Ministerial Decree of 7 May 1999 set out the requirements. You can read the exact wording of these texts in the highway code on your construction site. In both cases, the substance is essentially the same: the difference lies in the grounds on which you are held to account.
Why compliant materials matter, no matter what
- Municipal administrative fines: the municipality may impose fines for non-compliant or missing signage.
- Liability: if an accident occurs and your signage was not in order, you bear a greater risk.
- Permit: when applying for public domain occupancy, a signage plan using compliant materials is often required.
How does it work here?
All our construction site signage complies with the SB250 standard. When submitting a permit application, we draw up the relevant signage plan and supply signs that meet the specifications, installed and collected from the construction site. This ensures you’re in good shape both administratively and on site.
Need construction site signage or a permit?
We arrange your construction site signage and your public domain occupancy permit, from the signage plan to delivery, installation and collection. Tell us about your site and you'll get a concrete proposal quickly.
Last updated on 1 september 2026.
Further reading
Other articles that will help you on your way.
- Who is responsible for putting up the construction site signage?Whoever carries out the works is responsible for ensuring that road signs are correctly installed, even if you put them up yourself. If they are installed incorrectly or do not meet the legal requirements, the police will not tow away illegally parked vehicles and may shut down the construction site.
- Putting up your own parking signs: a summary of the rulesIf you are putting up the parking signs yourself, you must position them exactly as specified in your permit: one set per 25 metres, with the start sign showing the arrow pointing upwards, the end sign showing the arrow pointing downwards, and the dates and times on the lower panels. Take photographs whilst performing the installation and send these, together with the number plates of the cars already parked there, to the police and the municipality.
- Applying for a public domain occupancy permit: how it worksFor works or a container on the pavement, parking strip or roadway you need a public domain occupancy permit. You apply for it per municipality via EagleBE, Spotbooking or the city's occupancy form. Expect a processing time of a few working days to two weeks. We take the entire application off your hands.
Apply for a permit in your municipality
We arrange public domain occupancy across Flanders. See how it works in your municipality.
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