GRID · THE FUTURE GRID
The Grid Being Built
The grid isn’t finished — it’s being extended right now to plug in new wind and solar and to feed the data-centre boom. This is that build-out: 752 planned and under-construction high-voltage corridors at 300kV and above, every one a real line that an OpenStreetMap mapper has tagged as proposed or being built. They’re drawn dashed and in greenso they read apart from the solid network that already carries power — planned is not the same as built.
How far along
Not every line here is equally certain. Most are under construction— steel in the ground, near-certain to switch on — while the rest are proposed, real plans that may still change. On the map the under-construction corridors are drawn brighter; the proposed ones sit back.
Where the grid is being built
One honest caveat reads loudest here: about 79% of these corridors are in Europe. That’s partly real — Europe is in a genuine grid-expansion boom to wire up offshore wind and cross-border links — but it’s also because European mappers track grid projects far more thoroughly in OpenStreetMap. So this is a map of where the build-out is mapped, densest across Europe; much of Asia is under-represented at this voltage tier.
About this data
Every line here is a real feature from OpenStreetMap that a mapper has explicitly tagged as proposed or under construction (the lifecycle tags proposed:power=line and construction:power=line, via the Overpass API, ODbL) — nothing here is inferred or guessed. It’s baked at the same 300kV floor as the built transmission backbone, so the two layers are the same tier: toggle both and you see the grid that exists in solid blue and the grid being built in dashed green. Coverage follows OpenStreetMap’s mapping, which is heavily Europe-weighted, so treat this as the mappedbuild-out, not a complete global picture. Plans change — a proposed line may be delayed or dropped — which is exactly why proposed and under-construction are drawn differently. Snapshot taken 2026-06-24.