Per km of road:
Vehicles per kilometer of road include cars, buses, and freight vehicles but do not include two-wheelers. Roads refer to motorways, highways, main or national roads, secondary or regional roads, and other roads. A motorway is a road specially designed and built for motor traffic that separates the traffic flowing in opposite directions."
"Latin American and Caribbean Vehicles Profile", NationMaster. Retrieved from http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles
"Latin American and Caribbean Vehicles Profile, NationMaster." 2002-2007. <http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles>.
'Latin American and Caribbean Vehicles Profile, NationMaster', <http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles> [assessed 2002-2007]
"Latin American and Caribbean Vehicles Profile", NationMaster [Internet]. 2002-2007. Avaliable from: <http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles>.
"Latin American and Caribbean Vehicles Profile", NationMaster. Avaliable at: nationmaster.com. Assessed 2002-2007.
"Latin American and Caribbean Vehicles Profile, NationMaster," http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles (assessed 2002-2007)
"Latin American and Caribbean Vehicles Profile", NationMaster, http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles (last visited 2002-2007)
"Latin American and Caribbean Vehicles Profile", NationMaster, http://www.nationmaster.com/country-info/groups/Latin-America-and-Caribbean/Transport/Vehicles (as of 2002-2007)
Facts and figures about Latin America and Caribbean