Bournemouth is a large resort town on the south coast of England. At the 2011 census, the town had a population of 183,491, making it the largest in Dorset. With Poole to the west and Christchurch in the east, Bournemouth is part of the South East Dorset conurbation, which has a population of 465,000.
Head to the Cooper Dean Roundabout near Bournemouth Hospital. On the opposite side of the Wessex Way to the Toby Carvery there's a bus stop on the slip road where cars join the dual carriageway. It's an ideal spot to wait for a lift to Salisbury, and if you can get to the A36 on the west side of Salisbury you should be able to find a lift to Bristol.