The transportation system is a supplement to the ordinary Tycoon Online gameplay. Vehicles perform tasks of transportation between the cities of Tycoon Online, and by doing this, they give their owners small monetary compensations and a more significant company value boosts.
A company does not NEED vehicles to function - they do not at all affect your factories, shops or warehouse.
Vehicles can also run without supervision as long as they have a worker assigned to them. Vehicles pick up and transport goods automatically, but can be made more efficient by players actively ordering them to cities that have more goods to transport.