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  "tunnel_check": "osm tunnel=* ways on 5 own way(s)",
  "tunnel_ranges_m": [],
  "underground_fraction": 0.0,
  "structure_mask_ranges_m": [
   [
    2973.0,
    2981.4
   ],
   [
    5827.7,
    5833.5
   ],
   [
    0.0,
    15.0
   ]
  ],
  "mask_basin_extension_m": 3.0,
  "carriageway": {
   "stations": 263,
   "stations_resolved": 263,
   "width_median_m": 5.25,
   "width_p10_m": 4.0,
   "width_min_m": 1.75,
   "width_max_m": 12.0,
   "bounded_share": 0.407,
   "unbounded_share": 0.593,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.0,
   "window_m": [
    4189.0,
    4214.0
   ],
   "width_at_max25_m": 4.0,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "stations": 263,
    "stations_resolved": 263,
    "width_median_m": 7.5,
    "width_p10_m": 4.75,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.726,
    "unbounded_share": 0.274,
    "confidence_median": 1.0,
    "width_median_bounded_m": 7.0,
    "window_m": [
     4189.0,
     4214.0
    ],
    "width_at_max25_m": 7.25,
    "window_stations": 7,
    "status": "ok",
    "source": "dsm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.5,
    "break_min_m": 0.3,
    "stations_failed": 0
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Ullensvang",
  "county": "Vestland",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}