Function CanConvertUnownedRoadType

src/road_cmd.cpp:2412–2415

* Checks the tile and returns whether the current player is allowed to convert the roadtype to another roadtype without taking ownership * @param owner the tile owner. * @param rtt Road/tram type. * @return whether the road is convertible */

 * @return whether the road is convertible
 */
static bool CanConvertUnownedRoadType(Owner owner, RoadTramType rtt)
{
	return (owner == OWNER_NONE || (owner == OWNER_TOWN && rtt == RTT_ROAD));
}

/**
 * Convert the ownership of the RoadType of the tile if applicable