The A3112 is one of three A-roads on the Scilly Isles, and is the southernmost British classified road. Originally unclassified, the road gained its current number in the 1960s along with the other two roads on the island. It is narrow and poorly signed but not busy.
Church St, Hugh Town
Beginning in the middle of Hugh Town on the A3111, the A3112 heads east along Church Street to reach the actual church. From here Church Road turns left back to the A3111; this is given Class I status by some maps. Meanwhile the A3112 continues southeast, now on Church Road itself. It passes the hospital and school and there is a brief rural section (with a tight left-hand bend) before the road reaches Old Town Bay, which it follows to the settlement of Old Town itself.
The road heads northeast through the village and passes a turning to the airport before ending at a T-junction on the A3110 at Parting Carn. That road's junction with the A3111 is just to the left.