The M3 Warning Line, often called a caution line, is a broken white line used on Swedish roads to indicate that it's generally unsuitable to cross due to traffic conditions. It typically separates opposing traffic directions and serves as an early warning, especially before bends, crests, or other sections where visibility might be limited. While dashed, it signals strong caution; always prioritize staying in your lane and only overtake when it is clearly safe and unimpeded.
Learn the key details of the M3 - Warning Line 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.
A warning line is used where visibility, alignment, or traffic conditions make crossing risky, such as before crests, bends, or complex sections. It signals that overtaking or crossing the line may be unsafe even if not always strictly forbidden. The line separates lanes for opposing directions and acts as an early risk indicator. Drivers should treat it as a strong caution and plan to stay in lane.
A broken line that warns it is unsuitable to cross due to traffic conditions. It typically separates opposing directions.
Get clear, practical answers to the most common questions about the M3 - Warning Line 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 M3 Warning Line is a broken white line that warns drivers that crossing it is unsuitable due to traffic conditions, visibility, or road alignment. It typically separates opposing traffic flows and suggests caution, rather than an outright prohibition.
You should be especially cautious when encountering the M3 Warning Line before bends, crests (hills), or in sections where visibility is poor. These are precisely the situations where the line warns that crossing or overtaking might be risky, even though it's a dashed line.
While the M3 Warning Line is dashed, it signifies a warning, not a clear invitation to overtake. You should only overtake if you are absolutely certain it is safe, considering oncoming traffic, visibility, and the road ahead. It's often better to wait for a safer section, especially if you see this line before a bend or crest.
A solid center line (like the M1) generally indicates a strict prohibition against crossing or overtaking. The M3 Warning Line is a dashed line, implying a strong caution that crossing is unsuitable or risky under current conditions, but it may not be absolutely forbidden in all circumstances, especially if it's very clear you can do so safely. However, always err on the side of caution with the M3.
A common trap is assuming that because the M3 is a dashed line, it's always safe to cross or overtake. Learners might forget that the 'warning' aspect is crucial. The exam will test your understanding that this line represents potential danger, and you should avoid casual crossing or overtaking in risky situations.
The M3 Warning Line strongly advises you to stay in your lane and increase your following distance. While not as strict as a solid line, its purpose is to deter crossing in potentially unsafe conditions. You should only consider crossing if it's clearly safe, but the general principle is to prepare for upcoming stricter markings and maintain your lane.
A clear reference image of the M3 - Warning Line road sign used in Sweden.
The M3 - Warning Line road sign may also be known by these alternative names or terms.
The M3 - Warning Line road sign is part of the Road Markings (M) category, which groups together signs with similar rules and functions.