M4 motorway

The M4 is a long motorway in the United Kingdom. It goes from London to South Wales. It also passes Bristol. It was first called the London–South Wales Motorway. 
Junctions.
!scope=col|mile
!scope=col|km
!scope=col abbr="Eastbound"|Eastbound exits (B carriageway)
!scope=col|Junction
!scope=col abbr="Westbound"|Westbound exits (A carriageway)