- A390 between A30 and roundabout at Threemilestone, Cornwall excluding Isles of Scilly (Grid ref SW750467)
- A390 between roundabout at Threemilestone and Station Rd roundabout, Cornwall excluding Isles of Scilly (Grid ref SW800449)
- A390 between Station Rd roundabout and A39, Cornwall excluding Isles of Scilly (Grid ref SW820440)
- A390 between A39 and A3078, Cornwall excluding Isles of Scilly (Grid ref SW850460)
- A390 between A3078 and A3058, Cornwall excluding Isles of Scilly (Grid ref SX000517)
- A390 between A and B3273, Cornwall excluding Isles of Scilly (Grid ref SX009520)
- A390 between B3273 and Charlestown Rd roundabout, Cornwall excluding Isles of Scilly (Grid ref SX020519)
- A390 between Charlestown rd roundabout and Bucklers Lane, Cornwall excluding Isles of Scilly (Grid ref SX035524)
- A390 between Bucklers Lane and A391, Cornwall excluding Isles of Scilly (Grid ref SX040526)
- A390 between A391 and A3082, Cornwall excluding Isles of Scilly (Grid ref SX049530)
- A390 between A3082 and A3082, Cornwall excluding Isles of Scilly (Grid ref SX060536)
- A390 between A3082 and B3269, Cornwall excluding Isles of Scilly (Grid ref SX068549)
- A390 between B3269 and B3269, Cornwall excluding Isles of Scilly (Grid ref SX088590)
- A390 between B3269 and B3268, Cornwall excluding Isles of Scilly (Grid ref SX100595)
- A390 between B3268 and A38, Cornwall excluding Isles of Scilly (Grid ref SX119600)
- A390 between A38(T) and A388, Cornwall excluding Isles of Scilly (Grid ref SX300666)
- A390 between A388 and Cornwall excluding Isles of Scilly boundary, Cornwall excluding Isles of Scilly (Grid ref SX400709)
- A390 between Devon boundary and B3362, Devon (Grid ref SX459730)