Carriageway 12 or C12 is a road in the Harvian Islands that is part of the Harvian Islands Road System.
The carriageway is a short strip of road along the southeast coast of Leeward Island, branching from Carriageway 5.
|Infrastructure of the Harvian Islands|
|Airports: Port Philip International Airport - Reefs District Airport - Northern District Airport - HarviAir|
|Road Traffic: Carriageway 1 - Carriageway 2 - Carriageway 3 - Carriageway 4 - Carriageway 5 - Carriageway 6 - Carriageway 7 - Carriageway 8 - Carriageway 9 - Carriageway 10 - Carriageway 11 - Carriageway 12 - Harvian Islands Road System|
|Rail traffic: Leeward Island Railway - Harvian Railroads Company|
|Water traffic: Unified Harvian Ferries - List of UHF routes|