Multi Lane Drop

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Multi Lane Drop
M25 Motorway - Geograph - 162595.jpg
A Multi-Lane drop on the M25 with the M26
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A Multi Lane Drop is a term used for junctions which 2 or more lanes are lost due to the lanes being dedicated to take traffic to another Motorway or road, however the lanes lost may reappear on the other side of the junction. Through junction traffic usually cannot use dropped lanes, so typically 2 or more lanes are dropped when a large proportion of the traffic changes direction at the junction.

Most countries do not have a large amount of 4 or 5 lane Motorways, therefore it is uncommon to find multi-lane drops in the EU/NA except in and around large cities.

Different types of Lane drop at junctions

Through Junction Running

Through junction running is where all lanes continue through the junction at the diverge, however on the merge, an additional lane(s) can be added.

Single Lane Drop

Single lane drop is where lane 1 is lost at the junction at the diverge. At the merge (if there is one) the lane can be added back, or additional lane(s) can be added or the lane may not reappear.

Multi Lane Drop

This is the same as Single, however 2 or more lanes are dropped from Motorway. The will typically require the road to already have 4 lanes in order for it to drop two lanes, however it is possible to drop two lanes from a three lane road, although none of these currently exist in the UK and would make driving a HVG in the 3rd lane a difficult task.

Some roads gain an extra lane to the left before the junction, these have been excluded* as the lane is only gained for the purpose of holding traffic changing route.

List of Multi Lane Drops in the UK

  • Unless partially noticeable



Multi Lane Drop
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M25 Motorway - Geograph - 162595.jpg
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