Highway 7, about 10 kilometres past Sandon on the way to Chang. After Sandon the road deteriorates badly and you'll be working hard all day. There's pot holed paved sections (above), and silty dirt sections which are hard going indeed.
Mr Pumpy is taking a break, and chatting to the Khmer farmer in Austro-Khmer, an idiosyncratic mix of Australian English and badly pronounced Cambodian. In Oxford English, the above would come out something like: "Top of the morn, my good man! Rather hot, eh?"