MergingUnited Kingdom
Traffic rules
United Kingdom
1. Merging
Merging is the process of joining a stream of traffic from another lane or road, such as when an entry lane joins a motorway or when two traffic lanes become one. The merging driver must observe surrounding traffic, signal when required and enter an appropriate gap safely.
Drivers already in the continuing traffic lane should remain alert to merging vehicles and avoid unnecessarily preventing them from joining. Special zipper-merging rules may apply when traffic is heavily congested and a lane ends.
When is merging in turn recommended in the United Kingdom?
Highway Code Rule 134 recommends merging in turn only where safe and appropriate in very slow-moving traffic, for example at roadworks or a road incident. It is not recommended as a high-speed manoeuvre.
What must a driver check before changing lanes in the United Kingdom?
Use mirrors and, when needed, a sideways glance to check the intended lane. Signal when it is safe, and do not force another road user to change course or speed.
