- A411 between A41(T) and A5183, Hertfordshire (Grid ref TQ170951)
- M1 between Harrow boundary and Harrow boundary, Harrow (Grid ref TQ169946)
- A41 between A5183 / A5 and A411, Hertfordshire (Grid ref TQ164950)
- A5183 between A41 and A411, Hertfordshire (Grid ref TQ176950)
- A41 between Hertfordshire boundary and A5183, Hertfordshire (Grid ref TQ175944)
- M1 between A41 and LA boundary, Barnet (Grid ref TQ175943)
- A5 between Harrow boundary and A41, Harrow (Grid ref TQ173942)
- A411 between A409 and A41(T), Hertfordshire (Grid ref TQ160950)
- A41 between M1 spur and Barnet boundary, Barnet (Grid ref TQ176942)
- C, Aldenham Road, Hertfordshire (Grid ref TQ165965)
- A409 between Hertfordshire boundary and A411, Hertfordshire (Grid ref TQ156945)
- A409 between A4140 and Harrow boundary, Harrow (Grid ref TQ154940)
- A4140 between A410 and Harrow boundary, Harrow (Grid ref TQ160934)
- A411 between A4140 and A409, Hertfordshire (Grid ref TQ150946)
- A5 between Barnet boundary and A410, Barnet (Grid ref TQ180932)
- A41 between A411 and B462, Hertfordshire (Grid ref TQ150959)
- A41 between A410 and M1 spur, Barnet (Grid ref TQ184933)
- A4140 between A409 and A411, Hertfordshire (Grid ref TQ150940)
- M1 between LA boundary and J5, Hertfordshire (Grid ref TQ147961)
- U, Ashdown Drive, Hertfordshire (Grid ref TQ185971)