Read the road before recalling a number

A Belgian speed-limit question is rarely just “What is the speed limit?”

It is really asking several smaller questions. Is there a posted limit? Are you inside a built-up area? Which region are you in? Is the road a motorway or a divided road? Does a lower limit apply because of the vehicle or location?

The sign comes before the default. The default fills the gap when no more specific limit is shown.

Inside a built-up area

The regional difference is sharpest when you enter a built-up area.

Brussels
30 km/h is the general limit inside built-up areas, unless a sign permits or requires another speed.
Flanders
50 km/h is the general limit inside built-up areas, unless a sign changes it.
Wallonia
50 km/h is the general limit inside built-up areas, unless a sign changes it.

Brussels being a 30 km/h region does not mean every road is limited to 30. Some roads are signed at 50 or 70. It means 30 is the starting rule inside the built-up area when no different sign applies.

Likewise, the 50 km/h default in Flanders and Wallonia does not override a Zone 30, a school-zone rule or a lower posted limit.

Outside built-up areas

On an ordinary road outside a built-up area, the default for a passenger car depends on the region.

Flanders
70 km/h on ordinary roads. A C43 sign can set another limit, including 90 km/h.
Brussels
70 km/h on ordinary roads outside built-up areas, subject to signs.
Wallonia
90 km/h on ordinary roads outside built-up areas, subject to lower signs.

This is the regional contrast learners usually need to remember: a road that would default to 70 in Flanders can default to 90 in Wallonia.

Do not decide from scenery alone. A wide rural road does not announce the region or the legal limit. The built-up-area signs, speed signs and road layout do.

Motorways and divided roads

The general maximum for a passenger car on a Belgian motorway is 120 km/h, unless signs impose a lower limit.

The same 120 km/h maximum can apply outside built-up areas on a road with at least two lanes in each direction when the directions are separated by something other than road markings, such as a central reservation.

A painted centre line alone is not that kind of physical separation. In that case, the regional 70 or 90 km/h rule normally remains relevant unless a sign says otherwise.

Count the lanes, but also look at what separates the traffic.

Where does a posted limit end?

A speed limit shown by an ordinary C43 sign generally applies until the next junction or until another sign introduces a different speed regime.

A zone works differently. Its limit continues throughout the signed zone until the end-of-zone sign, even after a junction.

Entering a built-up area also introduces that region's built-up-area limit unless another sign establishes a different rule. This is why a sequence of signs matters more than any single number seen earlier on the road.

The maximum is not always a safe speed

The displayed or default number is a maximum, not a promise that the road is safe at that speed.

Belgian law also requires drivers to adapt their speed to other road users, weather, visibility, traffic, the road and the vehicle. You must be able to stop for a foreseeable obstacle.

An exam picture showing fog, a child near the road or a blocked view may therefore be testing judgement as well as recall.

Why speed deserves extra attention in the theory exam

In the Category B theory exam, a wrong answer about the maximum permitted speed costs five points rather than one. Two five-point mistakes are enough to reduce a starting score of 50 to 40, below the 41-point pass mark.

Our complete exam guide explains the scoring. For speed itself, practise the decision in the same order every time: sign, zone, region, road and vehicle.

Theory B's Speed Run is built around that habit. The useful skill is not memorising five numbers. It is knowing which number belongs to the road in front of you.

Belgian sources

The limits in this guide were checked against the current Belgian Highway Code and regional guidance on 30 August 2026.

Learn how the rule changes, then practise choosing the limit under time pressure.

Explore Theory B →