A road interchange at dusk overlaid with an efficiency rating scale, a free-flow junction glowing at the top

The Momentum Papers · 12 of 15 · Policy brief

Measure the road, not just the engine

Europe has spent thirty years building standards for engines. No equivalent exists for the roads those engines run on. That gap makes congestion permanent and energy waste structural. One new standard changes it.

The policy gap

What exists, and what is missing

Engine standardInfrastructure standard
StatusExistsMissing
What it measuresPollutant emissions per kilometre under test conditionsEnergy kept as useful motion across a road network
What it regulatesCombustion, exhaust treatment, fuel injectionJunction design, crossing geometry, how often traffic is stopped
How it is enforcedType approval: no approval, no saleNot yet defined
Years in operationOver 30, from Euro 1 to Euro 7None
ResultLarge cuts in NOx and particulatesA gain no vehicle technology can deliver alone
The proposed standard: an infrastructure efficiency rating. A network-level measure of how much energy put into a road system is kept as useful forward motion, across all vehicle types. Networks that force frequent stops would score poorly; networks designed for continuous flow would score well. It is based on physics, independent of powertrain, and measurable today with existing sensors.
If Europe can set a standard for how cleanly fuel burns, it can set one for how often we force vehicles to waste it.

A call to action

Five things a government can do now

None of these needs a capital commitment. They need only the recognition that an infrastructure efficiency gap exists.

  1. Commission a baselineMeasure, for the first time, how much vehicle energy is lost to forced stops across the national road network.
  2. Define momentum-preserving designAsk transport agencies to set a technical definition that future standards and new designs can be assessed against.
  3. Designate pilotsLet councils name pilot sites where free-flow junctions can be built and measured, generating the evidence a standard needs.
  4. Add it to climate targetsClimate and transport plans focus almost entirely on electrification. A measurable infrastructure efficiency target adds what no vehicle can deliver.
  5. Work with UmpirealWe have the physics, the patent application and the business model. We are asking for the conditions in which free-flow junctions can be tested, scaled and standardised.
How many times on a single journey should we choose to destroy momentum through forced stops? Zero.