Dev builds pipeline to test every US interchange, finds bad map data in most of them

tomjohndesign · x · 2026-11-11

Designer @tomjohndesign says he finally built a pipeline that constructs and tests every interchange in the US — without AI — inside Vercel cloud sandboxes.

The bad news: he now has to fix map data for most US interchanges, since the vast majority have bad geometry. New Jersey is shown as an example.

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