A 400-metre stretch of the B3143, between Townsend Farm and Pellwell Farm in Pulham, will be closed to clear vegetation and carry out poletesting work. Picture: Google/Travel Dorset A ROUTE through Dorset will close for road maintenance - with a 41.6-mile diversion route in place. A 400-metre stretch of the B3143, between Townsend Farm and Pellwell Farm in Pulham, will be closed to clear vegetation and carry out poletesting work. The route, which serves as a key route through rural Dorset, will be shut in both directions from 9.30am until 3.30pm on Wednesday, July 14. A public notice from Dorset Council states the road closure is necessary in order to allow the maintenance to be carried out.