भारत के चार प्रमुख महानगरीय शहरों—दिल्ली, मुंबई, चेन्नई और कोलकाता—को जोड़ने वाली महत्वाकांक्षी राजमार्ग परियोजना को किस नाम से जाना जाता है?

Which mode of transport is most suitable for carrying bulky and heavy goods over very long distances, particularly in international trade, at the lowest cost?

National Waterway-1 of India covers which of the following stretches?

The North–South corridor, which is a part of the National Highway network, links which two locations in India?