They represent the conveyances, They represents 'modes'. Conveyance or modes can be defined as a process of transporting or carrying someone or something from one place to another in order to facilitate basic operations of an economy.

Movement of people, freight and information over their respective networks show the flow. This flow systems help to improve the quality of transport services by aggregating and analyzing passenger movement data, and site data from trains and stations.

A system of linked locations that are used to represent the functional and spatial organization of transportation is network. Transport network can be defined as a framework of routes linking different locations. It helps to describe a structure which permits movement of vehicles or flow of some commodity.

Infrastructure is the physical support of transport modes, where routes (e.g. rail tracks, canals or highways) and terminals (e.g. ports or airports) are the most significant components. Infrastructure can be defined as organizational or physical structures which help to facilitate basic operations in an economy.

• Transportation comprises freight services together with supporting and auxiliary services by all modes of transportation i.e., rail, road, air and sea for the movement of goods and international carriage of passengers.
  
• Transportation removes the hindrance of place, i.e., it makes goods available to the consumer from the place of production.
  

Having no personalized service is a disadvantage of railway; government monopoly forms of transport. Railway does not offer any personalized service to any of the customers. It serves the public equally. No extra facility is given to any individual.

Railways and Roadways are the only means of transportation over land. Railways have an advantage over roadways that, they can carry a large number of passengers as well as heavy loads to a long distances. 

Highest cost of transportation is the disadvantage of air mode of transportation. Air transport facilitates mobility of men and material by air. It is the fastest mode of transport. Air transport is very useful to travel long distance and it saves time as well.

Water transportation is the least expensive and slowest mode of freight transport. It is generally used to transport heavy products over long distances when speed is not an issue.The main advantage of water transportation is that it can move products all over the world.

Door-to-door is a canvassing technique that is generally used for sales, marketing, advertising, or campaigning, in which the person or persons walk from the door of one house to the door of another, trying to sell or advertise a product or service to the general public or gather information.

During transportation, agricultural produces and food are adversely affected than any other sector. Transportation boosts productivity of agricultural sector. Transportation can be defined as the means to carry people and goods from one place to another.

Transportation planning is the process of defining future policies, goals, investments, and designs to prepare for future needs to move people and goods to destinations.

Transport helps in stabilization of price. Transport exerts considerable influence upon the stabilization of the prices of several commodities by moving commodities from surplus to deficit areas.

A transportation planner is someone who works alongside government agencies to select and develop plans to organize mass transit. Transit routes may be developed for walking, bicycling, bussing, rail or air.

Transportation is a major contributor to the economy and a competitive force in business. It is the activity that physically connects the business to its supply chain partners, such as suppliers and customers, and is a major influence on the customer's satisfaction with the company.

Bicycles is the common means of traditional transport in rural areas which accounts for 75% in usage. Bicycles are widely use as the mode of transportation in rural areas. It is also one of the cheapest mode of transportation.

A greater consumption brings in better social welfare is related to standard of living. Greater consumption implies increase in aggregate demand which in turn helps to increase the income level of an economy. As a consequence the standard living rises due to greater consumption.