Madrid nearly tripled its metro in 12 years at a fraction of London's per-mile cost

In 1995 the Madrid Metro was 114 kilometers long — only 51st in the world. Over the next 12 years it grew by 203 kilometers, nearly tripling, with airport links, a new circular line and suburb extensions. The 56-kilometer, 37-station 1995–1999 program cost about $2.8 billion in 2024 prices — roughly what New York paid for the 1.5-mile No. 7 extension to Hudson Yard, and nearly ten times less per mile than London's Jubilee Line Extension built in the same window. The World Bank called Madrid's costs 'substantially below the levels that were internationally considered possible'.

The Community of Madrid had its own assembly, tax powers, a roughly €25 billion budget and control of the transit consortium that funds the metro. The election winner held approval, funding and oversight in one pair of hands, and the PP had made expansion its signature promise; station locations were often decided within 24 hours. Environmental assessments were abbreviated by law for urban extensions — confirmation within five months, and just 19 pages for the 6.5-kilometer Line 11 extension, against a 17,912-page statement for Britain's 5.3-kilometer Portishead reopening.

Eight tunnel boring machines worked 24 hours a day, compressing up to eight years of street disruption into three; Madrid Metro head Manuel Melis Maynar sold the trade-off plainly: months of closed streets, 'but it was for their benefit'. Stations were standardized, copy-and-paste designs — the opposite of the Jubilee Line, where every station had its own architect and London Bridge alone cost £217 million; even if Madrid's whole 1995–1999 budget had gone only to stations, they would cap near £60 million each.

Planners also chose tried-and-tested fixed block signaling over fashionable moving block: the window from end of construction to opening was three weeks, while the Elizabeth line needed three years of signaling tests that added £2 billion. A nine-engineer in-house team — including four geotechnical experts who had watched London's 1994 Heathrow tunnel collapse — steered the whole program, and folklore has the eight TBM crews comparing progress in tapas bars after shifts; the best teams were rehired for the next project.

One government held planning, funding and construction; politicians' fortunes rode on delivery, so stations were copy-pasted and TBMs ran 24/7.

The region that votes for the metro also taxes, funds and builds it, so promises and consequences land on the same politicians.

Environmental review was abbreviated by law for urban extensions — five-month confirmations instead of multi-year processes.

Eight tunnel boring machines ran around the clock, cutting up to eight years of street disruption down to three.

Stations were standardized and signaling kept to proven fixed block, trading novelty for certainty and speed.

A project pipeline kept the nine-engineer in-house team and the best-performing contractors compounding experience.

Accountability works when the people who promise a project hold every lever to build it; speed then stops being a luxury — it cuts financing exposure and keeps voters on side.

Madrid, and Spain as a whole, have kept building infrastructure at some of the lowest costs in Europe since the 1990s. The expanded network carried 677.5 million riders in 2019 — 210 trips per resident, ahead of London's 155 and New York's 203 — and MetroSur, the line linking five southern towns, has seen almost a billion trips since opening. Works in Progress distilled the program into four lessons for cities that struggle to build cheaply: pipeline-fed state capacity, explicit trade-offs, time is money, and city-level power that rewards fast, inexpensive delivery.