Port Moresby is spread out and not walkable — even well-lit main streets are not safe for foreigners on foot. The standard advice is simple: take taxis everywhere, and always arrange them through your hotel or a restaurant rather than hailing them on the street. Rental cars are available at the airport if you are confident driving (left-hand traffic, Australian-style). Do not use the public buses ("PMVs") unless you are travelling with a local you trust.