Infrastructure is what lets people & goods move, and delivers essential services. Good infrastructure grows the economy and lifts quality of life; weak or unequal infrastructure limits access and deepens inequality.
The world faces a huge infrastructure gap — trillions of dollars are needed, especially in fast-growing developing cities.
| Metro system | City / country | Route length |
|---|---|---|
| Shanghai Metro | Shanghai, China | ~830 km |
| Beijing Subway | Beijing, China | ~800 km |
| Guangzhou Metro | Guangzhou, China | ~650 km |
| Moscow Metro | Moscow, Russia | ~460 km |
| London Underground | London, UK | ~400 km |
| Sydney Metro | Sydney, Australia | growing fast |
Much US infrastructure was built mid-20th-century & is now ageing, with a large maintenance backlog (bridges, roads, water). Renewal is costly & slow.
China has built vast new infrastructure at speed — high-speed rail (the world’s largest network), metros, ports & the global Belt and Road Initiative.
Shanghai Metro — from nothing in 1993 to the world's longest metro (~830 km), moving millions daily. Rapid, state-led building to serve a mega-city.
Sydney Metro — Australia's first fully automated (driverless) metro. The Sydenham–Bankstown conversion turns a 130-year-old railway into modern metro; Metro West & the Western Sydney Airport line are under construction — reshaping Sydney's growth.
Note one way good infrastructure grows a city — and one way weak infrastructure holds it back.
Sydney is spending billions on Metro & the Western Sydney Airport. Is big infrastructure the best use of public money — or should it go elsewhere (schools, housing, health)?
"Explain how patterns of infrastructure differ between places, and analyse how infrastructure change reshapes a place." (~600 words)