it is also consistent with the results of recent oecd research which showed a strong positive relationship between the amount of developed land per capita and the number of cars per residents see annex a however korea s motorisation rate is below what many european countries the united states and canada registered at comparable income levels figure it also remains one of the lowest in the oecd figure this is likely the result of a comparatively efficient public transport system coupled with population densities that allow for widespread use of public transport which indicates bus and rail hereinafter except some cases including the national public transport master plan in table korea s low motorisation rate relative to its income level bodes well for its capacity to prevent further congestion and to enhance ecological sustainability orgl en