Minimum radius for a design speed

Frammenti di codice

curl "https://api.oanor.com/horizontalcurve-api/v1/min-radius" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/horizontalcurve-api/v1/min-radius", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/horizontalcurve-api/v1/min-radius");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/horizontalcurve-api/v1/min-radius",
    headers={"x-oanor-key": "oanor_test_..."}
)

Risposta di esempio

Una risposta reale di questo endpoint, acquisita dall'ultimo health check.

{
    "data": {
        "note": "The minimum curve radius for a design speed (AASHTO) R = V² ÷ (15·(e + f)), where e is the superelevation (road banking, up to ~0.08–0.12) and f the maximum side-friction factor the tyres can use (falls with speed, ~0.10–0.16). Banking and friction together hold the car in the turn against the centripetal demand — a sharper curve than this needs a slower speed or more bank. Metric form uses 127 instead of 15.",
        "inputs": {
            "side_friction": 0.12,
            "superelevation": 0.08,
            "design_speed_mph": 60
        },
        "min_radius_ft": 1200,
        "degree_of_curve_max_deg": 4.7746
    },
    "meta": {
        "timestamp": "2026-06-07T08:18:03.369Z",
        "request_id": "fb609266-77de-46eb-b620-ba03307d7e4e"
    },
    "status": "ok",
    "message": "Min radius",
    "success": true
}