The M1 sign, indicating a Center Line or Lane Line, is a crucial road marking that uses a broken white line to separate traffic. It serves two main purposes: as a center line, it divides opposing traffic flows on two-way roads, while as a lane line, it separates lanes moving in the same direction. Pay close attention to this marking, as crossing it is permitted only when safe and legally allowed by other signs or conditions.
Correctly interpreting the M1 Center Line or Lane Line is crucial for maintaining safe driving behavior on Swedish roads. This road marking definition is frequently tested, so understanding its full meaning and practical application is vital for your driving theory test revision.
This marking is a broken line used to separate lanes or directions of travel. As a center line, it divides road space for opposite directions and helps you keep a safe position, especially on two way roads. As a lane line, it separates lanes moving in the same direction and supports smooth lane discipline. Depending on the road type, the dash to gap pattern can vary, and it can also mark the center of a cycle path in some contexts.
A broken line that separates traffic flows or lanes. It shows the boundary between opposing directions (center line) or between lanes in the same direction (lane line).
Get clear, practical answers to the most common questions about the M1 - Center Line or Lane 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 M1 sign, represented by a broken white line on the road, acts as either a center line or a lane line. As a center line, it separates traffic moving in opposite directions. As a lane line, it separates lanes travelling in the same direction. It is always permissible to cross when safe.
You can cross the M1 broken line when it is safe to do so and when no other signs or traffic conditions prohibit it. For example, you can cross a lane line to change lanes or cross a center line to overtake or turn, provided it is safe and permitted by other traffic rules.
Prohibited actions include drifting across the line without checking your surroundings, changing lanes without ensuring it's safe, or using the line as an automatic permission to overtake blindly. Always assess the situation for safety before crossing.
A solid white line prohibits crossing, marking a boundary that should not be crossed under normal circumstances. The M1, a broken white line, indicates that crossing is permitted, provided it is safe and legally allowed. The length of the dashes and gaps can also vary depending on the road type and speed.
Yes, in some contexts, the M1 marking can also be used to mark the center of a cycle path, especially on shared roads. Always be aware of other road users, including cyclists, and adjust your driving accordingly.
A clear reference image of the M1 - Center Line or Lane Line road sign used in Sweden.

The M1 - Center Line or Lane Line road sign may also be known by these alternative names or terms.
The M1 - Center Line or Lane Line road sign is part of the Road Markings (M) category, which groups together signs with similar rules and functions.
Comparing the Center Line or Lane Line marking with other road markings helps solidify your understanding and prevent confusion, crucial for passing your theory test. Effective traffic sign comparison improves your ability to quickly recognize different road lines, aiding in your overall exam preparation and safe driving.

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Understand the M15 Pedestrian Crossing Markings and Pedestrian Priority

Understand the M16 Cycle Crossing Sign and Cyclist Priority

The M17 Speed Bump sign warns you to slow down for a traffic calming measure ahead.
Connect visual signage with essential Swedish traffic rules by exploring our curated set of practice questions and detailed road safety explanations. These resources reinforce your ability to interpret complex road situations according to Transportstyrelsen standards.
When you encounter a traffic accident in Sweden, your immediate actions can be critical. This guide explains how to prioritise your own safety while fulfilling your legal duty to assist and report the incident. Learn the correct procedures for securing the scene, offering aid, and contacting emergency services like Polisen or the national emergency number 112, all essential knowledge for passing your driving theory test.
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This marking defines the border between a cycle lane and an adjacent traffic lane. It helps drivers keep a safe lateral distance and prevents accidental encroachment into the cycle lane. The line is typically broken with equal dash and gap lengths, indicating the boundary clearly. You must be extra careful near this line, as cyclists may be present and vulnerable.
This marking defines the limits of a designated parking space or lineup area. It helps drivers position correctly so that vehicles fit within the intended area and do not obstruct lanes, cycle paths, or walkways. Depending on the location, it may be drawn as a continuous boundary or as a broken line. Correct use supports efficient parking and reduces conflicts in busy areas.
After reviewing this complete list of Swedish road signs, deepen your understanding by exploring signs by category or practicing with simulated test questions. Solidify your recognition skills and ensure you are fully prepared for every aspect of the official driving theory exam.
All Swedish Road Signs List