- U, The Comyns, Hertfordshire (Grid ref TQ144943)
- A4140 between A409 and A411, Hertfordshire (Grid ref TQ150940)
- A411 between A4140 and A409, Hertfordshire (Grid ref TQ150946)
- A409 between A4140 and Harrow boundary, Harrow (Grid ref TQ154940)
- A409 between Hertfordshire boundary and A411, Hertfordshire (Grid ref TQ156945)
- U, Moatfield Road, Hertfordshire (Grid ref TQ137957)
- A41 between A411 and B462, Hertfordshire (Grid ref TQ150959)
- A411 between A4008 and A4140, Hertfordshire (Grid ref TQ130953)
- U, Harcourt Road, Hertfordshire (Grid ref TQ140960)
- A411 between A409 and A41(T), Hertfordshire (Grid ref TQ160950)
- A4140 between A410 and Harrow boundary, Harrow (Grid ref TQ160934)
- M1 between LA boundary and J5, Hertfordshire (Grid ref TQ147961)
- U, Homefield Road, Hertfordshire (Grid ref TQ132960)
- A41 between A5183 / A5 and A411, Hertfordshire (Grid ref TQ164950)
- U, Little Bushy Lane, Hertfordshire (Grid ref TQ142964)
- U, Grange Road, Hertfordshire (Grid ref TQ126958)
- A409 between A410 and A4140, Harrow (Grid ref TQ149920)
- A4008 between Hertfordshire boundary and A4008 split, Hertfordshire (Grid ref TQ120948)
- A4008 between A410 and Harrow boundary, Harrow (Grid ref TQ136920)
- M1 between Harrow boundary and Harrow boundary, Harrow (Grid ref TQ169946)