traffic op• Data kinds: any → any
• Call: import fullseye as fs; fs.ledger.occlusion_safe_speed(d, *, reaction: 'float', brake: 'float') (to call the implementation directly, import drivetraffic; drivetraffic.occlusion_safe_speed(d, *, reaction: 'float', brake: 'float'); from the registry, opsdrive.get("occlusion_safe_speed"))
Maximum speed at which the car can stop within distance d from the moment of becoming visible: v = b(−ρ + sqrt(ρ² + 2d/b)).
The positive root, solved for v, of v ρ + v²/(2b) = d (free running + braking; the same formula as rsssafety.rss_stopping_distance(v, ρ, accel=0, brake=b)). To avoid cancellation it is computed as v = 2d / (ρ + sqrt(ρ² + 2d/b)) (sqrt(2 b d) for ρ = 0). d may be an array. If d ≤ 0, then 0 (by the time it is visible it is already too late).
Gate: rss_stopping_distance(v, ρ, 0, b) == d (second implementation, rtol 1e-12).
Raises ValueError: reaction < 0, brake ≤ 0, d non-finite (inf is allowed and returns inf).
Empty input (d with 0 elements) raises ValueError.
• 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.
• poc_driving_traffic — py -3.11 examples/poc_driving_traffic.py
any as input)course_crank · course_s_curve · course_turnaround · course_slope · course_intersection · course_parallel_parking · course_crossing · course_road
traffic)idm_accel · idm_equilibrium_gap · idm_platoon_simulate · driver_style · lateral_wobble · ou_estimate · social_force_step · pedestrian_crossing
*Provenance: drivetraffic.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.