- A343 between A30 and Wiltshire boundary, Wiltshire (Grid ref SU250354)
- A343 between Hampshire boundary and B3084, Hampshire (Grid ref SU270368)
- A343 between B3084 Romsey Rd and B3084 Wallop Rd, Hampshire (Grid ref SU290379)
- A343 between B3084 and A303, Hampshire (Grid ref SU300392)
- A343 between A303/A342 roundabout and A3057, Hampshire (Grid ref SU350466)
- A343 between Saxon Way, Andover and B3048, Hampshire (Grid ref SU363500)
- A343 between A3057/A3093 and Saxon Way, Hampshire (Grid ref SU364475)
- A343 between B3048 and A34, Hampshire (Grid ref SU400548)
- A343 between A34 and Hampshire boundary, Hampshire (Grid ref SU450630)
- A343 between West Berkshire boundary and Garden Close Lane, Newbury, West Berkshire (Grid ref SU453635)
- A343 between Garden Close Lane and A339, West Berkshire (Grid ref SU469664)