The T4 'Clear Width' supplementary plate is a crucial information sign used in Sweden, often in conjunction with other signs or road layouts. It specifies the exact available width for your vehicle to pass through a restricted section of road, such as roadworks, narrow bridges, or between barriers. Always check this measurement against your vehicle's width, including mirrors and any load, before proceeding. If your vehicle exceeds this clear width, you must not enter the passage. This sign is vital for preventing collisions and ensuring smooth traffic flow during your Swedish driving licence studies.
Learn the key details of the T4 - Clear Width road sign, including its function, what it communicates to drivers, and how it applies in real traffic situations in Sweden. Use this overview to understand the sign clearly and recognise it confidently during the Swedish driving theory exam.
This supplementary plate provides a width measurement that tells you how much horizontal space is available. It is used where vehicles may be limited by narrow lanes, roadworks, bridges, barriers, or other constrictions. The value helps you judge whether your vehicle can pass safely without hitting obstacles. You must consider mirrors, trailers, and any load width, not just the body of the car. If your vehicle exceeds the clear width, you must not enter.
Indicates the available clear width at a narrow passage or restricted area.
Get clear, practical answers to the most common questions about the T4 - Clear Width road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the Swedish driving theory exam in Sweden.
The T4 sign indicates the exact horizontal space, measured in metres, that is safely available for you to drive through a narrow passage or restricted area. It’s essential to know this measurement to avoid collisions.
When checking if your vehicle fits the clear width indicated by the T4 sign, you must account for the total width, which includes wing mirrors, any external accessories, and the width of your load or trailer. If your vehicle's total width is greater than the stated clear width, you cannot pass.
If your vehicle, including mirrors and load, is wider than the measurement shown on the T4 'Clear Width' sign, you must not attempt to pass. You should look for an alternative route or wait for conditions to change if possible, ensuring you do not obstruct traffic or risk damage.
A common trap is forgetting to account for mirrors or trailers when judging if your vehicle fits the indicated width. Always assume the stated width is the absolute maximum, and be extra cautious if visibility is poor or the passage is tight. The theory exam might present scenarios where you need to decide if passing is safe based on your vehicle's dimensions and the sign's information.
A clear reference image of the T4 - Clear Width road sign used in Sweden.

The T4 - Clear Width road sign may also be known by these alternative names or terms.
The T4 - Clear Width road sign is part of the Supplementary Plates (T) category, which groups together signs with similar rules and functions.