|To:||Pamphill, Wimborne Minster (SY997991)|
|Via:||The New Forest (North), Fordingbridge & Cranborne|
|Distance:||26.6 miles (42.8 km)|
|Meets:||B3079, B3080, A338, B3081, B3082, B3073, A31|
|Old route now:||B3079|
|Route outline (key)|
The B3078 is a long B-road running west of the New Forest. It can be seen to be a slightly longer but more winding alternative to the parallel A31.
Originally the road started on the A31 in Cadnam but this section became the B3079 in 1935. It therefore now starts on that road over a mile west in Brook. It heads west through one of the New Forest's 40mph zones and climbs steadily to Bramshaw Telegraph, where the B3080 forks off to the right. The road then descends Deadman's Hill to reach the village of Godshill. It leaves the New Forest National Park before entering Fordingbridge where there is a GSJ with the A338 before the River Avon is crossed.
For many years the B3078 headed northwestwards out of Fordingbridge into Damerham before continuing on to Cranborne. In the 2000s the road was rerouted to follow the current straighter route and so it heads westwards into Dorset and the village of Alderholt. It goes through Cripplestyle and Lower Holwell to Cranborne, where it has to TOTSO left in the centre of the village by the Fleur De Lys pub; the road rejoins its original route here.
Heading south, the B3081 multiplexes with the B3078 for a short distance (our number is dominant) before the road passes over the chalk downs to Knowlton and Stanbridge before eventually reaching Wimborne Minster.
The B3078 originally ended here on the A31 but that road now bypasses the town to the south. The B3073 and B3082 are met somehow; owing to the old narrow streets there is a one-way system through the town.