UPSC Prelims · General Studies

Geography

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India: resources, agriculture, industry and transport

Roads and railways

National, state, district and rural roads; expressways; road density
Golden Quadrilateral; North-South corridor (Srinagar to Kanyakumari) and East-West corridor (Silchar to Porbandar); Bharatmala
Border Roads Organisation and strategic roads
Cross-border projects: India-Myanmar-Thailand Trilateral Highway (Moreh to Mae Sot), Kaladan, BCIM corridor (Kolkata to Kunming)
Railway zones, gauges, Konkan Railway, metro systems, dedicated freight corridors