Why are the means of transport called the 'lifelines' of nation's economy?

The means of transport are called the 'Lifelines' of nation's economy because:

1. It helps in the development of trade and commerce.
2. It facilitates the movement of goods from producer to consumer and vice verse.
3. Connectivity of rural areas to cities provide them opportunities and lead to their development.
4. It has helped in the growth of industrial and agricultural production in the country. It has been transporting raw materials and labour to places of production and finished products to different parts of country and abroad.
5. It promotes tourism.
6. It promotes foreign trade of the country.
7. It helps in expansion of the market both on the international and domestic front.
8. It unites people from one corner of the land to other.