a. Road transport offers door-to-door service—that is, passengers or goods are picked up from a certain location and transported to the final destination. It is capable of reaching out to even those places where other modes of transport cannot reach, for instance, hilly areas. 

b. The carrying capacity of rail transport is huge. Rail transport helps in carrying heavy and costly goods conveniently and safely, even to distant locations. It is a safe and secure means of transporting goods from one place to another. 

c. Air transport is the costliest mode of transportation of goods and passengers, mainly because of its expensive fuel and high operational costs. However, this mode is the most effective and time-saving, especially for long-distance transportation. It is also effective during situations of natural calamities like earthquakes and floods. 

d. The department comes under the Ministry of Communication and Information Technology and is administered by the Government of India. The department offers financial services, mail services and direct post services. 

e. Courier services are governed and owned by private companies. Under these services, goods and mails are transported from one place to another. Courier companies ensure speedy and safe transmission of goods from one place to another. DHL, FedEx and TNT are examples of courier companies.