Location : The A405 northbound between the junctions with the M1 and the M25 .

Location : The M11 northbound exit slip at junction J7 .

Location : The M4 eastbound exit slip at junction J4 .

Location : The M25 clockwise exit slip at junction J25 .

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 .