A new machine paints the white lines down the middle of the road.
Titles read: "WATCH THE WHITE LINE!"
Somewhere in England - probably London.
Various shots of a workman demonstrating a new machine that paints the white lines along the middle of the road - "made necessary in the blackout" says commentator. The machine also paints white lines on the edge of a kerb, so that "gone are the bending and daubing" of doing the job by hand.