the white lines on the sides are bumpy,
so blind people know where the edge of the motorway is, FACT!
( Dai_Marzipan Ain't no party like an S Club party, Tue 27 Jan 2004, 15:20, archived)

actually
It's to wake truck drivers up when they fall asleep at the wheel
( dragonish:::, Tue 27 Jan 2004, 15:21, archived)

I love those things
the grindy noise they make is fantastic.
( dr_fonz, Tue 27 Jan 2004, 15:22, archived)