The UD21.1 "Two-way cycle traffic" sign is a mandatory Danish traffic sign that dictates a specific action you must take. It can instruct you on the required direction, lane usage, path, minimum speed, or the specific route for a road user. You must position your vehicle early to comply with the instruction indicated by the sign and any accompanying road markings or panels.
Mastering the UD21.1 'Two-way cycle traffic' sign is crucial for safe navigation and successful theory test revision in Denmark. This mandatory sign directs specific path usage for cyclists, ensuring clarity on shared or dedicated routes.
This Danish mandatory sign requires a specific action rather than merely giving information. It may prescribe direction, lane choice, path use, pass-side, minimum speed, or the route for a particular road user. Drivers should match the sign to the correct lane and road layout, then check markings, panels, and end signs to understand how long the instruction remains in force. Official catalogue code: UD21.1.
The "Two-way cycle traffic" sign requires the direction, path, lane use, minimum speed, pass-side, or road-user route shown. Position early and follow the instruction smoothly. Catalogue code UD21.1.
Get clear, practical answers to the most common questions about the UD21.1 - Two-way cycle traffic 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 Danish driving theory exam in Denmark.
The UD21.1 sign means you must follow a specific instruction related to your movement, such as a mandatory direction, lane choice, or designated path. It is a mandatory sign, so you are required to comply with its directive.
When you see the UD21.1 "Two-way cycle traffic" sign, you must prepare to follow the instruction it gives. This might involve moving into a specific lane, following a particular direction, or using a designated path. Always check for accompanying road markings, arrows, or sub-panels that provide further details.
Yes, you are prohibited from choosing a different movement or direction than what the UD21.1 sign requires. You also should not assume the instruction has ended until you see a sign indicating its termination or until later traffic rules supersede it.
A common trap is assuming the sign's instruction applies only for a very short distance, or not paying attention to accompanying lane arrows or markings. Learners might also be tested on differentiating this mandatory instruction from informational signs. Always be prepared to follow the instruction precisely.
While the title is 'Two-way cycle traffic', the sign is a mandatory directive for all relevant road users in that context, which includes drivers of cars. It indicates a required path, direction, or lane use that must be adhered to by traffic navigating that section of the road.
A clear reference image of the UD21.1 - Two-way cycle traffic road sign used in Denmark.

The UD21.1 - Two-way cycle traffic road sign may also be known by these alternative names or terms.
The UD21.1 - Two-way cycle traffic road sign is part of the Danish Mandatory Signs category, which groups together signs with similar rules and functions.
Reinforce your understanding of traffic rules by comparing related road signs. Distinguishing between similar signs like 'Two-way cycle traffic' and others is crucial for accurate theory test revision and safe driving.

D11.1 Mandatory Direction: You Must Follow This Instruction

D11.2 Mandatory Direction: Follow the Required Path or Lane

Mandatory Direction: Follow the Arrow or Lane Indicated

Mandatory Direction Signs: Follow the Path Set For You

The D11.5 Mandatory Direction Sign: You Must Follow This Path

This D11.6 sign mandates a specific direction or path – follow it closely!

Follow the Mandatory Direction Indicated by Sign D11.7

Follow the Mandatory Direction indicated by the D11.8 sign
After reviewing the full list of Danish road signs, test your understanding by attempting practice questions focused on sign recognition and meaning. Reinforce your learning and identify areas needing further study to confidently pass your driving theory exam.
View All Danish Road Signs List