- A338 between B3065 and Poole boundary, Poole (Grid ref SZ067916)
- A338 between Bournemouth boundary and A347 Richmond Hill Roundabout, Bournemouth (Grid ref SZ082915)
- A338 between A347 Richmond Hill Roundabout and A338 St Pauls Roundabout, Bournemouth (Grid ref SZ094918)
- A338 between A35 St Pauls Roundabout and A3049 Richmond Park Road, Bournemouth (Grid ref SZ095920)
- A338 between A3049 Richmond Park Road and A3060 Cooper Dean Roundabout, Bournemouth (Grid ref SZ118939)
- A338 between A3060 Cooper Dean Roundabout and Bournemouth boundary, Bournemouth (Grid ref SZ130950)
- A338 between Dorset boundary and B3073, Dorset (Grid ref SZ132956)
- A338 between B3073 Blackwater Junction and A31 (roundabout), Dorset (Grid ref SU134036)
- A338 between A354 and Exeter Street, Wiltshire (Grid ref SU144289)
- A338 between A354 and A3094, Wiltshire (Grid ref SU145287)
- A338 between Exeter St. and A36, Wiltshire (Grid ref SU147292)
- A338 between Milton Rd, Salisbury and A354, Wiltshire (Grid ref SU150284)
- A338 between A31(T) and B3078, Hampshire (Grid ref SU151100)
- A338 between B3078 and Hampshire boundary, Hampshire (Grid ref SU160181)
- A338 between Wiltshire boundary and Milton Rd, Salisbury, Wiltshire (Grid ref SU169240)
- A338 between A30 and Roman Road, Wiltshire (Grid ref SU177350)
- A338 between Portway and B3084, Wiltshire (Grid ref SU200383)
- A338 between A346S and A346N, Wiltshire (Grid ref SU225589)
- A338 between A338 main route and A303, Wiltshire (Grid ref SU230435)
- A338 between A303 and A338 main route, Hampshire (Grid ref SU230438)
- A338 between B3084 and A338 spur, Hampshire (Grid ref SU231436)
- A338 between A3026 and A342, Wiltshire (Grid ref SU234500)
- A338 between A338 spur and Hampshire boundary, Hampshire (Grid ref SU235450)
- A338 between Wiltshire boundary and A3026, Wiltshire (Grid ref SU235480)
- A338 between A342 and A346, Wiltshire (Grid ref SU240531)
- A338 between Wilton Road and A346, Wiltshire (Grid ref SU250605)
- A338 between Fair Mile and Wilton Road, Wiltshire (Grid ref SU270606)
- A338 between C Road towards Wexcombe and Wiltshire boundary, Wiltshire (Grid ref SU300623)
- A338 between West Berkshire boundary and A4, West Berkshire (Grid ref SU331670)
- A338 between A4 and M4, West Berkshire (Grid ref SU347700)
- A338 between M4 and B4000, West Berkshire (Grid ref SU361730)
- A338 between B4000 and West Berkshire boundary, West Berkshire (Grid ref SU391763)
- A338 between Oxfordshire boundary and A417, Oxfordshire (Grid ref SU394848)
- A338 between A417 and Oxford Lane, Oxfordshire (Grid ref SU400892)
- A338 between A417 and A417, Oxfordshire (Grid ref SU400885)
- A338 between Oxford Lane and A417 North of Wantage, Oxfordshire (Grid ref SU407902)
- A338 between A415 and Oxford Lane, Oxfordshire (Grid ref SU421932)
- A338 between A415 and A415, Oxfordshire (Grid ref SU442970)
- A338 between A415 and A420, Oxfordshire (Grid ref SP450000)