Location : The A421 northbound between the junctions with the A4280 and the A1 .

Location : The M25 clockwise exit slip at junction J22 .

Location : The A14 westbound exit slip at junction J55 Copdock.

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

Location : The A14 eastbound entry slip at junction J33 Cambridge.

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 J6 and J7 .