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  "road_source": "OpenStreetMap (local PBF extract)",
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  "notes": "Coarse pass: max 16.2% over 200 m (Terrain 50), gain 279.7 m over 2834 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (NE wave 1, 2026-08-25): big-gain. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
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  "license_url": "https://howsteep.org/licensing.html"
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}