North Korean citizens usually cannot freely travel around the country,[31] let alone travel abroad.[5][6][31] Emigration and immigration are strictly controlled.[31][71] Only the political elite may own or lease vehicles, and the government limits access to fuel and other forms of transport due to frequent shortages of gasoline/petrol, diesel fuel, crude oil, coal and other fossil fuels (satellite photos of North Korea show an almost complete absence of vehicles on all of its roads throughout the country, even in its cities). Forced resettlement of citizens and whole families, especially as punishment for political reasons, is said to be routine.[72]