dilemma_zone — DRIVE decide op

• Data kinds: any → table

• Call: import fullseye as fs; fs.ledger.dilemma_zone(v, *, reaction: 'float', decel: 'float', amber: 'float', intersection_width: 'float', car_length: 'float', accel: 'float' = 0.0) -> 'Dict[str, object]' (to call the implementation directly, import drivedecide; drivedecide.dilemma_zone(v, *, reaction: 'float', decel: 'float', amber: 'float', intersection_width: 'float', car_length: 'float', accel: 'float' = 0.0) -> 'Dict[str, object]'; from the registry, opsdrive.get("dilemma_zone"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

黄信号のジレンマゾーン(Gazis, Herman, Maradudin 1960)。

速度 `v` で停止線の手前 x にいるとき黄が点いた:

止まれる ⇔ x ≥ x_c = v δ + v²/(2a) (δ = reaction、a = decel)

抜けられる ⇔ x ≤ x_0 = v τ + ½ a₁ (τ − δ)² − (w + L) (τ = amber、a₁ = accel ≥ 0、w = 交差点の幅、L = 車長)

(a₁ = 0 が基本形。加速は反応の後から黄の終わりまで、と置いた形。τ ≤ δ なら加速項は 0。)

max(x_0, 0) < x < x_c が ジレンマゾーン(止まれず抜けられない。x < 0 は停止線を越えているので除く)、

x_c ≤ x ≤ x_0 が 選べる区間(両方できる)。

日本の法令の読み: 教則 付表1(黄)は「停止位置に近く安全に止まれない場合はそのまま進行可」= **停止線を越えれば

よい**(交差点を黄のうちに抜ける義務ではない)。その読みでは `intersection_width = car_length = 0` として呼ぶ

(x_0 = vτ)。GHM の「交差点を抜ける」は全赤の時間が無い前提の厳しい読み。

返り値: `x_stop_min = x_c、x_clear_max = x_0、dilemma((lo, hi) か None)、option`(同)、

`length(ジレンマゾーンの長さ、無ければ 0)、v_critical`(a₁ = 0 のとき x_c = x_0 になる速度の組。

実根が無ければ空 = どの速度でもジレンマが無い)。`v は 1 つの数(配列は np.vectorize` などで)。

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)

• poc_driving_decisions — py -3.11 examples/poc_driving_decisions.py

Ops the type connects to (they accept table as input)

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (decide)

mirror_reflection_matrix · mirror_virtual_camera · mirror_aim_normal · convex_mirror_fov · mirror_blind_zone · check_sequence_score · signal_phase_plan · signal_state


*Provenance: drivedecide.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.