alex yates said:
https://www.rac.co.uk/drive/advice/driving-advice/middle-lane-hogging/
During busy periods, middle-lane hogging can cause congestion as traffic funnels through the outside lane to pass a lane hogger. If the driver in the middle lane moved over, the same traffic could be split over two lanes.
This statement contradicts itself?
If you are doing 70 then you are the traffic that is split over the 2 lanes?
The whole piece contradicts itself.
Changing lanes is one of the riskiest manoeuvres carried out on motorways.
It's when you're most likely to come into conflict with other vehicles – either by missing them in your blind spot, misjudging another car's speed or moving into a space at the same time as another vehicle.
It might seem logical, then, to remain in one lane on the motorway rather than 'weaving' between lanes when overtaking. It's true that
drivers should avoid excessive weaving.
Use common sense – if you've overtaken a vehicle in lane one and you're approaching another, you'd normally be right to remain in the middle lane.
Speed is a factor, though: how long will it take for you to catch up with the next vehicle? And are there vehicles behind you waiting to get past?
Excessive weaving should definitely be avoided during periods of heavy traffic.
Often, during times of congestion on smart motorways, the overhead gantries will display advice to 'stay in lane'.
In summary...
Don't manoeuvre too much, stay in lane if it is busy and stay in lane on a smart motorway?
Why is it safe to "stay in lane" on a smart motorway and not safe on a dumb motorway?