Lanes merge

What it means

To guide you by means of a diagram, which indicates that, a lane merges with another lane or that roadways join

What you must do

Whenever a lane ends, converges, merges or is added, make sure in time that there is a big enough gap in the traffic to merge with the traffic. Also yield to other traffic, which might merge.

Source: Signs manual GS401, GS403, GS404, GS406