- M1 between LA boundary and J5, Hertfordshire (Grid ref TQ147961)
- A41 between A411 and B462, Hertfordshire (Grid ref TQ150959)
- U, Little Bushy Lane, Hertfordshire (Grid ref TQ142964)
- U, Harcourt Road, Hertfordshire (Grid ref TQ140960)
- U, Moatfield Road, Hertfordshire (Grid ref TQ137957)
- U, Homefield Road, Hertfordshire (Grid ref TQ132960)
- A411 between A4140 and A409, Hertfordshire (Grid ref TQ150946)
- A411 between A409 and A41(T), Hertfordshire (Grid ref TQ160950)
- A409 between Hertfordshire boundary and A411, Hertfordshire (Grid ref TQ156945)
- U, The Comyns, Hertfordshire (Grid ref TQ144943)
- A411 between A4008 and A4140, Hertfordshire (Grid ref TQ130953)
- C, Aldenham Road, Hertfordshire (Grid ref TQ165965)
- A41 between A5183 / A5 and A411, Hertfordshire (Grid ref TQ164950)
- B462, Aldenham Road, Hertfordshire (Grid ref TQ126964)
- U, Grange Road, Hertfordshire (Grid ref TQ126958)
- A4140 between A409 and A411, Hertfordshire (Grid ref TQ150940)
- A409 between A4140 and Harrow boundary, Harrow (Grid ref TQ154940)
- A41 between B462 and A4008 / M25 J5, Hertfordshire (Grid ref TQ131978)
- A411 between A41(T) and A5183, Hertfordshire (Grid ref TQ170951)
- M1 between Harrow boundary and Harrow boundary, Harrow (Grid ref TQ169946)