Motorway lane gain sign
A blue sign with a diagram showing one lane on the motorway being joined by one lane from the left.
Traffic emerging from London joins from our left - two lanes of it, actually, to make a three-lane sliproad.
A blue sign with a diagram showing one lane on the motorway being joined by one lane from the left.
Traffic emerging from London joins from our left - two lanes of it, actually, to make a three-lane sliproad.