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| Route information | ||||
| Length | 84 mi (135 km) | |||
| Major junctions | ||||
| South end | Poole, Dorset  A3550°43′26″N 1°54′25″W / 50.7240°N 1.9070°W | |||
 A347 A3049 A3060 A31 A354 A3094 A36 A30 A303 A3026 A342 A346 A4  J14 → M4 motorway  A417 A415 | ||||
| North end | Besselsleigh, Oxfordshire  A42051°42′10″N 1°20′55″W / 51.7029°N 1.3487°W | |||
| Location | ||||
| Country | United Kingdom | |||
| Primary destinations | Bournemouth Ringwood Salisbury Tidworth Wantage | |||
| Road network | ||||
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The A338 is a major primary route in southern England, that runs from the junction with the A35 at Poole in Dorset to the junction with the A420 at Besselsleigh in Oxfordshire, a distance of 84 miles (135 km).
In Bournemouth and Poole the road is known as the Wessex Way.