Why a road scheme takes twenty years in Britain

Anyone who drives the same corridor for years watches the same bottleneck get discussed, consulted on, designed, challenged and deferred. Here is why that is structural rather than incompetence.

How major roads get funded

England's strategic road network — motorways and major A roads — is run by National Highways and funded through Road Investment Strategies: multi-year settlements setting out what will be built in a defined period.

That has an obvious upside: a pipeline with money attached rather than annual guesswork. It also means a scheme that misses a period waits for the next one, which is measured in years rather than months.

Then the consent process

A large road scheme is a Nationally Significant Infrastructure Project and needs a Development Consent Order rather than ordinary planning permission. That process involves statutory consultation, an examination, and a decision by the Secretary of State.

It is designed to be thorough, and it is. It also means a scheme can be consented and then challenged in the courts, quashed, reworked and re-decided — each round taking a year or more.

Where the years actually go

Almost none of that elapsed time is building. It is deciding exactly what to build and obtaining permission for it.

The A303 as the standard example

The route past Stonehenge has been a recognised bottleneck for generations. Proposals to improve it — including a tunnel past the monument — have been made, consulted on, consented, challenged, redetermined and revisited over a period spanning decades.

The competing interests are genuine rather than procedural: a World Heritage Site, an internationally significant archaeological landscape, and a road that turns the south-west into a summer car park every year.

The Lower Thames Crossing

The other perennial. The Dartford Crossing carries far more traffic than it was designed for, and a second crossing further east has been the proposed answer for a long time. It is one of the largest road proposals in the country and has been through years of consultation and consenting.

Both cases show the same pattern: the case for doing something is not seriously disputed, and almost all the elapsed time goes on deciding exactly what and getting permission for it.

Smart motorways as the alternative that was tried

Part of the appeal of smart motorways was precisely that they added capacity within the existing footprint — no land acquisition, no consent for a new route, much faster to deliver.

That trade was reconsidered after safety concerns, and the rollout of new schemes was halted in 2023. Which puts the network back to the older options: build new, or manage demand.

What it means for someone who drives for a living

Practically: the corridor that is congested today will probably still be congested in five years, so plan around it rather than waiting for it to be fixed.

And keep your own data. If a route consistently costs you an hour, that is worth knowing precisely — a year of recorded journeys tells you what a bottleneck actually costs your business, which is a better basis for changing how you work than a general sense of frustration.

Sources

• GOV.UK — Road Investment Strategy
• National Highways
• National Highways — Our roads
• GOV.UK — Department for Transport

General information on UK roads policy. Scheme status changes: check National Highways for the current position on any specific project.