The A3259 is a small A-road in the Taunton area, taking the former route of the A361.
The route starts at a roundabout junction with the A358 at Priorswood at the northern end of the Obridge Viaduct. From here it heads east along Priorswood Road to a new roundabout serving the new houses of Maidenbrook and then becomes more of a country lane than a road befitting its former A361 status, although the speed limit remains. It runs along Yallands Hill and through Monkton Heathfield to end at a fork junction with the A38 at Monkton Elm near Walford Cross. The A38 from here to the A361 junction at Walford Cross is dualled, though this no longer provides much benefit as the second lane is either a merge lane or, at the further end, a turning lane, putting slow moving traffic in either lane at any time!
Before the A358 was re-routed over the Obridge Viaduct, it was part of the A3259.
The present section of the A3259 gained its number in the 1980s when the A361 was downgraded between Taunton and South Molton.