|To:||Higher Waterston (SY726956)|
|Length:||2.4 miles (3.9 km)|
|Meets:||A35, A354, B3143|
|Route outline (key)|
The B3142 is a short B-road in central Dorset.
It starts at the A35/A354 GSJ north of Puddletown (before the building of the A35 bypass it started in the village) by turning west off the northern of the two roundabouts. It runs parallel to the A35 for a short distance before following the River Piddle (or Trent) upstream, crossing the river after a few hundred yards.
Continuing upstream, it goes through Lower Waterston and terminates at a T-junction at Higher Waterston on the B3143.