Note: This chapter was removed from the NCERT curriculum in the 2022 rationalization. Retained here as settlement geography, transport networks, and infrastructure are relevant to UPSC GS1 (Economic Geography) and GS2 (governance, development).

PART 1 — Quick Reference Tables

Types of Settlements

Type Location Economic Base Population
Temporary (migratory) Forests, deserts, highlands Hunting, nomadic herding, shifting cultivation Very small groups
Permanent Rural Agricultural plains, river valleys Farming, fishing, small trades Hundreds to thousands
Urban Historically: rivers, trade routes; now: any location with economic activity Industry, services, trade, government Thousands to millions

Transport Modes — Comparison

Mode Best For Limitations India Status
Roads Short-medium distances, door-to-door, flexible routes Slow for long distances; high carbon footprint per tonne-km ~63.86 lakh km (world's 2nd largest road network)
Railways Long distances, bulk cargo, passengers Fixed routes, high infrastructure cost ~68,000+ km route length; 4th largest in world
Inland waterways Bulk cargo (cheap, low carbon); no puncture of tyres Slow, limited to rivers and canals; seasonal 20,000 km potential; ~3,700 km actively used
Sea (shipping) International trade; bulk cargo (coal, ore, grain, oil) Slow; need ports ~95% of India's trade by volume moves by sea
Air Fast, long distance; high value / perishable cargo + passengers Expensive; high carbon ~150 operational airports; UDAN scheme expanding connectivity
Pipelines Oil, gas, water over long distances Only for fluids/gases; fixed route Oil/gas pipeline network expanding

PART 2 — Detailed Notes

Settlement Patterns

Key Term

Where do settlements form?

The location of settlements is determined by:

  1. Water availability: Nearly all ancient settlements are near rivers (Nile, Ganga, Indus, Mesopotamia, Yangtze, Thames)
  2. Fertile land: Agricultural societies settle where soil is good for farming
  3. Defence: Many historical settlements on hilltops, inside bends of rivers, on islands (Mumbai — originally islands; Delhi — on the Yamuna; Agra — Yamuna)
  4. Trade routes: Junctions of trade routes grew into towns (Varanasi, Agra, Lahore — all on ancient routes)
  5. Resources: Settlements near coal (Jharkhand), minerals, forests

Rural settlement patterns:

  • Nucleated (clustered): Houses close together; common in areas with limited water or where defence needed
  • Dispersed: Houses spread out; common in hilly areas or where land holdings are large
  • Linear: Along a road, river, or railway line

Urbanisation in India (Census 2011):

  • Urban population: 377 million (31.16% of total); Urban India = 3rd most populous urban population after China and USA
  • Census 2021 (delayed — expected data ~2025–26): Urban population estimated ~35–40%
  • Primate city: City far larger than the next city in a country — Delhi and Mumbai are India's "primate cities"

Transport Networks

UPSC Connect

UPSC GS2/GS3 — India's Transport Infrastructure:

Road network:

  • National Highways (NH): ~1.46 lakh km (2025); managed by NHAI (National Highways Authority of India)
  • Golden Quadrilateral: 5,846 km; connects Delhi-Mumbai-Chennai-Kolkata; 4/6-lane expressway; India's first major highway modernisation project
  • North-South and East-West Corridor: 7,142 km; connects Srinagar to Kanyakumari and Silchar to Porbandar
  • Pradhan Mantri Gram Sadak Yojana (PMGSY): All-weather roads to rural habitations; launched 2000; major rural connectivity scheme

Indian Railways:

  • 4th largest rail network in world (~68,000+ km route, ~1.3 lakh km track including loops)
  • Carries ~2.3 crore passengers/day (pre-COVID; recovering to similar numbers)
  • Dedicated Freight Corridors (DFC): Eastern DFC (Ludhiana to Dankuni) and Western DFC (Mumbai to Dadri/Jawaharlal Nehru Port Trust); separate freight tracks to free passenger lines
  • Vande Bharat trains: Semi-high-speed (160 km/h); indigenously designed and manufactured
  • Bullet Train Project: Mumbai-Ahmedabad High Speed Rail Corridor (508 km); Japan-funded (JICA); target speed 320 km/h; under construction

Inland Waterways:

  • National Waterway 1 (NW-1): Ganga-Bhagirathi-Hooghly system (Allahabad to Haldia, 1,620 km) — most important
  • National Waterway 2 (NW-2): Brahmaputra (Sadiya to Dhubri, 891 km)
  • Jal Marg Vikas Project: Developing NW-1 for cargo movement; World Bank funded

UDAN Scheme (Ude Desh ka Aam Nagrik):

  • Regional air connectivity scheme; subsidised seats on flights to unconnected/underserved airports
  • Aim: Affordable air travel to Tier-2 and Tier-3 cities; opened ~500+ routes under UDAN 1.0–5.0

Communication

Explainer

Modern communication — key facts for UPSC:

Telecom:

  • India = world's 2nd largest telecom market (after China) by subscribers
  • ~1.17 billion mobile subscribers (2025 estimate)
  • BharatNet: Government project to provide broadband connectivity to all 2.5 lakh gram panchayats via optical fibre
  • 5G: Rolled out from 2022; India's 5G network expansion is one of world's fastest

Internet:

  • India has ~900+ million internet users (2025 estimate) — 2nd largest in world after China
  • Affordable data due to Jio's disruption (2016) — average data usage among world's highest

Space-based communication:

  • ISRO (Indian Space Research Organisation) manages communication satellites
  • GSAT series: Communication satellites; broadcasting, VSAT, DTH
  • OneWeb (now Eutelsat OneWeb) has Bharti (Airtel) as major shareholder — LEO satellite broadband

Postal system:

  • India Post: World's largest postal network — ~1.55 lakh post offices (2025); more post offices than any country
  • India Post Payments Bank (IPPB): Financial inclusion through post office network

Exam Strategy

Prelims traps:

  • Golden Quadrilateral = 4 cities (Delhi, Mumbai, Chennai, Kolkata); ~5,846 km; NOT a pentagon or triangle
  • PMGSY = rural roads (to villages, not national highways)
  • NW-1 = Allahabad to Haldia (Ganga-Hooghly system); NW-2 = Brahmaputra — both frequently asked
  • India Post = world's largest postal network (by number of post offices) — NOT USA or China
  • DFC: Two dedicated freight corridors — Eastern and Western — separate tracks for freight trains
  • 95% of India's trade (by volume) = by sea — NOT railways or roads (weight/volume not value)
  • UDAN scheme = aviation + regional connectivity (Civil Aviation Ministry) — NOT rail scheme

Previous Year Questions

Prelims:

  1. The "Golden Quadrilateral" highway project connects which four cities?
    (a) Delhi, Mumbai, Chennai, Kolkata
    (b) Delhi, Jaipur, Ahmedabad, Mumbai
    (c) Mumbai, Pune, Bangalore, Chennai
    (d) Delhi, Lucknow, Patna, Kolkata

  2. The Pradhan Mantri Gram Sadak Yojana (PMGSY) aims to provide:
    (a) National highways to state capitals
    (b) All-weather road connectivity to unconnected rural habitations
    (c) Dedicated freight corridors for agricultural produce
    (d) Urban ring roads to decongest major cities