Most of Russia is poor and without self transportation means. So many use public transportation, Mainly train or bus.
Petroleum is the main source of energy for transportation.
The bullet train
flying cars
oil
Horses, wagons and trains
petroleum
Petroleum.
Not really sure car probably.
Maksim Yuryevich Sokolov is the Minister of Transportation for Russia.
"Oil and gas" US dollars
The Amish
Kansas' main source of income comes from agricultural products, primarily cattle and wheat. Kansas also receives income from manufacturing items, the main manufactured product is transportation equipment.