curve_speed_limit — DRIVE `lateral` op

• Data kinds: any → any

• Call: import fullseye as fs; fs.ledger.curve_speed_limit(radius, *, side_friction: 'float', superelevation: 'float' = 0.0, g: 'float' = 9.81) (to call the implementation directly, import drivelateral; drivelateral.curve_speed_limit(radius, *, side_friction: 'float', superelevation: 'float' = 0.0, g: 'float' = 9.81); from the registry, opsdrive.get("curve_speed_limit"))

Usage

Upper speed limit without sliding outward on a curve (radius R) with superelevation i and side-friction coefficient f: v = √(g R (i + f)/(1 − i f)) [m/s].

> The detailed description below is the original text — the summary and the headings are translated.

道路構造令の解説 (2) 式 Z cos α − G sin α ≤ f (Z sin α + G cos α)(Z = G v²/(gR)、i = tan α)を v について解いた厳密な形。i f ≥ 1 なら(どの速さでも外へは滑らない)inf。radius は配列でもよい(> 0)。

Raises ValueError: R ≤ 0、f < 0、|i| ≥ 1、i + f ≤ 0(止まっていても内へ滑る)。

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• (none yet)

Ops the type connects to (they accept `any` as input)

course_crank · course_s_curve · course_turnaround · course_slope · course_intersection · course_parallel_parking · course_crossing · course_road

Same category (`lateral`)

friction_circle_usage · design_min_radius · understeer_gradient · steady_cornering · bicycle_model_step · ackermann_steer_angles · offtracking_circle · rear_axle_path

*Provenance: drivelateral.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

curve_speed_limit — DRIVE lateral op