Motorway lane gain sign
A blue sign with a diagram showing three lanes on the motorway being joined by one lane from the left.
A fourth lane comes in from junction 12, but it'll come and go at most of the junctions up ahead.
A blue sign with a diagram showing three lanes on the motorway being joined by one lane from the left.
A fourth lane comes in from junction 12, but it'll come and go at most of the junctions up ahead.