This slip road has been the location of many a minor shunt, as it joins the main Wessex Way with only a very short acceleration lane, and with restricted vision on a blind left-hand sweep of the main carriageway. (See
SZ0891 : Bournemouth: Richmond Hill Interchange for a view of the blind spot and the previous markings.)
The junction has therefore sensibly been re-marked, with the slip road becoming the left-hand lane, and only the right-hand lane arriving here on the main line of the road.
This is signified by the road sign and also appreciable by way of the road markings in the background.
Meanwhile, the footpath on the left drops down to Horseshoe Common.