- A342 between A4 and A3102, Wiltshire (Grid ref ST957700)
- A342 between A3102 North and A3102 South, Wiltshire (Grid ref ST968670)
- A342 between A3102 and A361, Wiltshire (Grid ref ST975648)
- A342 between A361 and A360, Wiltshire (Grid ref SU008614)
- A342 between A360 and Marshall Rd roundabout, Wiltshire (Grid ref SU012610)
- A342 between Marshall Rd roundabout, Devizes and B3098, Wiltshire (Grid ref SU021601)
- A342 between B3098 and Pewsey Rd/Church Lane Jct, Wiltshire (Grid ref SU100564)
- A342 between Pewsey Rd/Church Lane and A345, Wiltshire (Grid ref SU129550)
- A342 between A345 and A345, Wiltshire (Grid ref SU132548)
- A342 between A345 West and A345 East, Wiltshire (Grid ref SU134549)
- A342 between A345 and A338, Wiltshire (Grid ref SU200540)
- A342 between A338 and A346, Wiltshire (Grid ref SU238519)
- A342 between A346 and A3026, Wiltshire (Grid ref SU260510)
- A342 between A3026 and Wiltshire boundary, Wiltshire (Grid ref SU272506)
- A342 between Hampshire boundary and Amesbury Rd, Hampshire (Grid ref SU283500)
- A342 between Amesbury Rd and A303/A343 roundabout, Hampshire (Grid ref SU320466)