I shouldn't be surprised anymore, as a wheelbarrow is a pretty common mode of transportation here, but I can't help, but ask to take a picture when I see it. Majority of people in PNG do not have cars. They get from point A to point B by walking, or taking a PMV - a Public Motor Vehicle. For places that are close by (within 5 miles) they will likely just walk, outside of that, most likely they will pay for a PMV. But sometimes, they find other modes of transportation too - and a wheelbarrow is always a good form, especially with the PNG roads.