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A growing town at dusk: cars queued at a red light beside a housing site with tower cranes and an electricity substation

The Momentum Papers · 01 of 15 · Series introduction

Three pressures, one root cause

Energy costs, housing shortages and traffic congestion are treated as separate problems. They share a root cause: urban infrastructure that is designed to destroy momentum.

The problem statement

Three crises, one root cause

Debates about the cost of living, climate change and how our towns work are often polarised. Yet wherever you stand, three realities are hard to ignore, and they are accelerating together.

Energy affordability

Households, businesses and public services face energy costs that feel impossible to control, even when global markets settle.

Housing shortages

Land near busy roads and junctions is expensive and hard to develop, which restricts supply and pushes homes further from work.

Traffic congestion

Time, fuel and productivity are lost every day without producing anything of value. Stop-go infrastructure is a machine for destroying wealth.

These challenges are discussed as separate policy problems. In reality they are connected, and reinforced by the same underlying system.

The hidden connection

Why stop-go makes everything worse

To understand why energy feels unaffordable, we have to look beyond oil markets and pump prices. To understand congestion, we have to look beyond traffic volumes. In both cases the deeper issue is how energy is taxed, how it is wasted, and how roads are designed to destroy it.

  1. Energy wastedEvery stop turns kinetic energy that was already paid for into brake heat.
  2. Cost inflatedFuel is burned twice, time is lost, and crashes happen at the conflict points.
  3. Land value suppressedCongested locations become less attractive to live and build in.
  4. Housing constrainedDevelopment economics weaken near the junctions a town depends on.

The real cost does not begin in the oil field, the refinery or even at the pump. It begins in the repeated, deliberate destruction of momentum that towns build into their own road networks, junction by junction and crossing by crossing.

The real question is not how efficiently we recover energy after it has been destroyed. It is why we destroy it so often in the first place.

The scale

Numbers that cannot be ignored

~€4.3TThe annual momentum tax in fuel, time and wear
~5,000 TWhEnergy lost every year to stopping, slowing and restarting
~75bn hrsOf human time lost every year
~1.3 GtCO₂ a year from stop-start alone
~€5–6TWider system cost once crashes and pollution are included
~25%Of US traffic deaths happen at intersections, and about half of injuries
Global figures are modelled across the world’s signalised junctions. Intersection safety figures: US Federal Highway Administration. Site-level figures are on our facts page.

About this series

The Momentum Papers

This is the first of fourteen papers. Each isolates one dimension of the problem or the solution: the hidden taxes at the pump, the physics of the stop, why electric vehicles do not fix it, the shockwave, the insurance cascade, the full cost, the lesson from biology, the missing policy standard, the Urban Computer and how it pays for itself, how concrete becomes a catalyst for cutting carbon, and finally why a busy junction destroys energy faster per square metre than any power station generates it.