This 874P direction sign, 'Additional lanes joining from right ahead', is designed to help you plan your route before reaching a junction or lane split. It provides advance notice that traffic will be merging into your lane from the right. You should read this sign early, match its information with road markings, and be prepared to adjust your lane position safely if needed. Remember, these signs are for planning, not for justifying sudden manoeuvres.
This direction sign (874P) is vital for understanding traffic flow changes, particularly where lanes merge from the right. Mastering its interpretation is key for effective theory test revision and safe road navigation.
Direction signs are used to reduce uncertainty before junctions, roundabouts, lane splits, and route changes. This sign may show destination names, route numbers, countdown distances, or where traffic can leave a route. The driver should read it early, match it with road markings, and continue safely if the intended movement cannot be made without a sudden manoeuvre. It is listed in the catalogue as code 874P.
"Additional lanes joining from right ahead" gives route, destination, lane, junction, or distance information. It helps the driver choose a safe lane or route before the decision point is reached.
Get clear, practical answers to the most common questions about the 874P - Additional lanes joining from right ahead 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 British driving theory exam in Great Britain.
The 874P sign is an information sign that alerts you to upcoming lanes merging into your path from the right. Its purpose is to give you advance warning so you can plan your driving, choose the correct lane early, and prepare to accommodate merging traffic safely.
When you see the 874P sign, you should immediately check your mirrors and be aware of traffic that may be joining from the right. You need to match the destination and route information on the sign with the lane markings ahead. If the lane indicated is your intended route, prepare to stay in it. If it's not, ensure you are in the correct lane well in advance.
A common trap is assuming you must move into the joining lane or that the joining traffic has priority. This sign doesn't force a manoeuvre; it's for planning. Another mistake is swerving or making a sudden lane change once the traffic is already merging, or crossing solid lines to get into a specific lane. Always plan ahead and avoid last-minute, unsafe actions.
If you miss the intended lane or junction indicated by the 874P sign, do not attempt a dangerous manoeuvre such as crossing solid lines or stopping unexpectedly. The advice is to continue safely on your current route and then re-route later. Safety is paramount, and it's always better to find a safe place to correct your course than to risk an accident.
No, the 874P sign indicates that lanes are joining from the right ahead, but it does not automatically grant priority to the joining traffic. Traffic already on the main carriageway generally has priority. You should be aware of merging traffic and adjust your speed or position if necessary and safe to do so, but you are not obligated to move over if it compromises your safety or lane discipline.
A clear reference image of the 874P - Additional lanes joining from right ahead road sign used in Great Britain.

The 874P - Additional lanes joining from right ahead road sign may also be known by these alternative names or terms.
The 874P - Additional lanes joining from right ahead road sign is part of the Great Britain Direction Signs category, which groups together signs with similar rules and functions.
Comparing similar road signs helps solidify your understanding and improve recall for your theory test revision. Understanding subtle differences between traffic signs is key for accurate recognition and avoiding confusion.

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Prepare for roundabouts and route exits with the 200 yd advance direction sign.

Prepare for Roundabouts and Exits with the 100 yd Direction Sign

Prepare for an additional lane joining from the left in 200 yards

Know the 'Steam Railway Tourist Attraction 300 yd Ahead' Sign

This sign indicates a junction leading to a tourist attraction ahead.

This brown sign indicates the direction and distance to tourist information points.
After reviewing the full list of road signs, challenge yourself with practice questions focused specifically on sign recognition. Reinforce your learning and ensure you're fully prepared to identify and understand all traffic signs on the DVSA theory test.
Browse All GB Road Signs List