In a well-managed transport system, various modes complement each other to ensure efficient movement of persons and goods. The principal modes of transportation—land, water, air, and pipelines—are used for both inter-regional and intra-regional transport. Each mode, except pipelines, carries both passengers and freight.

The significance of a mode depends on the type of goods and services to be transported, costs of transport, and the mode available. Different modes serve different needs: road transport is cheaper and faster over short distances and for door-to-door services. Railways are most suited for large volumes of bulky materials over long distances within a country. High-value, light and perishable goods are best moved by airways, while international movement of goods is handled by ocean freighters.

Transport establishes links between producing centres and consuming centres. Since natural resources, economic activities and markets are rarely found in one place, a coordinated transport system becomes essential. Each region produces items for which it is best suited, and trade relies on transportation.

Thus, when various modes work together, they create an efficient network that satisfies the basic needs of society. High living standards and quality of life depend on efficient transportation. In such a system, no single mode operates in isolation; rather, they complement each other to serve diverse transportation needs.