- A39 between A394 and A393, Cornwall excluding Isles of Scilly (Grid ref SW766350)
- A39 between B3292 Falmouth Rd and A394, Cornwall excluding Isles of Scilly (Grid ref SW775335)
- A39 between Castle Drive roundabout and B3292 Faalmouth Rd, Cornwall excluding Isles of Scilly (Grid ref SW800326)
- A39 between A393 and A390, Cornwall excluding Isles of Scilly (Grid ref SW811420)
- A39 between A390 and A390, Cornwall excluding Isles of Scilly (Grid ref SW827440)
- A39 between A390 and A390, Cornwall excluding Isles of Scilly (Grid ref SW831450)
- A39 between A390 and A30, Cornwall excluding Isles of Scilly (Grid ref SW841500)
- A39 between A392 and A3059, Cornwall excluding Isles of Scilly (Grid ref SW910610)
- A39 between A30(T) and A392, Cornwall excluding Isles of Scilly (Grid ref SW913597)
- A39 between A3059 and A389, Cornwall excluding Isles of Scilly (Grid ref SW946700)
- A39 between A389 and A389, Cornwall excluding Isles of Scilly (Grid ref SW971724)
- A39 between A389 and A395, Cornwall excluding Isles of Scilly (Grid ref SX076808)
- A39 between A395 and B3262, Cornwall excluding Isles of Scilly (Grid ref SX150886)
- A39 between B3262 and A3073, Cornwall excluding Isles of Scilly (Grid ref SX200976)
- A39 between A3073 and A3072, Cornwall excluding Isles of Scilly (Grid ref SS224060)
- A39 between A39 and A3072 Hospital Road, Cornwall excluding Isles of Scilly (Grid ref SS225061)
- A39 between A3072 Hospital Road and Cornwall excluding Isles of Scilly boundary, Cornwall excluding Isles of Scilly (Grid ref SS244100)
- A39 between Devon boundary and Clovelly Rd roundabout, Devon (Grid ref SS400238)
- A39 between Clovelly Rd roundabout and A386, Devon (Grid ref SS440278)
- A39 between A386 and A386, Devon (Grid ref SS450279)
- A39 between A386 and B3232, Devon (Grid ref SS500290)
- A39 between A3125 and A377, Devon (Grid ref SS550312)
- A39 between A361 and Westaway Plain, Devon (Grid ref SS560340)
- A39 between Westaway Plain and B3230, Devon (Grid ref SS561350)
- A39 between A377 and A361, Devon (Grid ref SS575320)
- A39 between B3230 and A399, Devon (Grid ref SS600404)
- A39 between A399 and B3223, Devon (Grid ref SS700474)
- A39 between B3223 and B3234, Devon (Grid ref SS741480)
- A39 between B3234 and Devon boundary, Devon (Grid ref SS760493)
- A39 between Somerset boundary and B3225, Somerset (Grid ref SS800481)
- A39 between Somerset boundary and A396, Somerset (Grid ref SS800481)
- A39 between B3225 and A396, Somerset (Grid ref SS990445)
- A39 between B3225 and A396, Somerset (Grid ref SS990445)
- A39 between A396 and B3190, Somerset (Grid ref SS999436)
- A39 between B3190 and A358, Somerset (Grid ref ST070407)
- A39 between A358 and C road to Cannington High St, Somerset (Grid ref ST200392)
- A39 between C road to Cannington High St and B3339, Somerset (Grid ref ST251390)
- A39 between B3339 and Quantock Meadow roundabout, Somerset (Grid ref ST279371)
- A39 between Quantock Meadow roundabout and B3339, Somerset (Grid ref ST285370)
- A39 between B3339 and A38, Somerset (Grid ref ST290369)
- A39 between Quantock Meadow roundabout and A38, Somerset (Grid ref ST293381)
- A39 between A38 and Bower Lane, Somerset (Grid ref ST310378)
- A39 between A38 Bristol rd and M5, Somerset (Grid ref ST310411)
- A39 between Bower Lane and A39 Puriton Hill, Somerset (Grid ref ST320386)
- A39 between A39 Bath Rd and M5, Somerset (Grid ref ST320411)
- A39 between A39 Puriton Hill and Shapwick Hill, Somerset (Grid ref ST404375)
- A39 between Shapwick Hill and A361, Somerset (Grid ref ST441363)
- A39 between A361 and Meadow Lane, Somerset (Grid ref ST462363)
- A39 between Meadow Lane and B3151, Somerset (Grid ref ST478368)
- A39 between B3151 and A361, Somerset (Grid ref ST486380)
- A39 between A361 and A371, Somerset (Grid ref ST500399)
- A39 between A371 and A371, Somerset (Grid ref ST543454)
- A39 between A39 and Old Bristol Road, Somerset (Grid ref ST548461)
- A39 between Old Bristol Road and A37, Somerset (Grid ref ST590521)
- A39 between A37 and B3355, Bath and North East Somerset (Grid ref ST635570)
- A39 between B3355 and B3115, Bath and North East Somerset (Grid ref ST640575)
- A39 between B3115 and A368, Bath and North East Somerset (Grid ref ST648600)
- A39 between A368 and A4, Bath and North East Somerset (Grid ref ST700653)