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Rule 135 ↗
Where a single carriageway has three lanes and the road markings or signs do not give priority to traffic in either direction
use the middle lane only for overtaking or turning right. Remember, you have no more right to use the middle lane than a driver coming from the opposite direction
do not use the right-hand lane.
Mastering Rule 135 : Navigating 3 - Lane Single Carriageways
THE MIDDLE LANE : RULES FOR USE
PROHIBITIONS AND LANE DISCIPLINE
Overtaking and Turning Right: On a 3 - lane single corriageway , the middle lane must only be used for overtaking other vehicles or preparing for a right - hand turn .
The No - Go Zone : The Right - Hand Lane: Under Rule 135 , drivers are strictly prohibited from using the right - hand lane on a three - lane single carriageway .
Shared Priority Warning
You have no more right to use the middle lane than a driver coming from the opposite direction ; both directions share this space .
Mutual Awareness Required: Always check for oncoming traffic before entering the middle lane , as a driver from the opposite side may be attempting to overtake at the same time .
Default Lane Position
Unless overtaking or turning right via the middle lane , drivers should maintain their position in the leftmost lane .
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