Location : The M25 anticlockwise at junction J16 .

Location : The A5 northbound between the junctions with the A5183 and the A4012 .

Location : The M4 westbound between junctions J14 and J15 .

Location : The M11 northbound entry slip at junction J6 from M25 anti-clockwise.

Location : The M40 southbound at junction J9 .

Location : The M40 southbound entry slip at junction J9 .

Location : The A34 southbound entry slip from the A423 north of Kennington.

Location : The M40 northbound between junctions J8A and J9 .

Location : The A308M eastbound between the junctions with the M4 and the A308 .

Location : The M4 westbound between junctions J13 and J14 .

Location : The M4 westbound between junctions J5 and J6 .

Location : The M4 westbound exit slip at junction J6 .