Road transport.
The 1960s used a lot of cars.
um i think it is trains
the most popular transport for the tourists is air transport
Railway is the most popular transport in Zambia.
cars
car
The Aeroplane.
If most popular means most visitors it's Les 3 Vallées with a transport capacity of a quartier of million persons per hour.
boat
a car
Rail transportation is the most common form of LONG DISTANCE transport in China.