lane_change_follower_decel — DRIVE pass op

• Data kinds: any → table

• Call: import fullseye as fs; fs.ledger.lane_change_follower_decel(gap, v_follow, v_ego, *, reaction: 'float', accel_ego: 'float' = 0.0, min_gap: 'float' = 0.0, sudden: 'float' = 2.0) -> 'Dict[str, object]' (to call the implementation directly, import drivepass; drivepass.lane_change_follower_decel(gap, v_follow, v_ego, *, reaction: 'float', accel_ego: 'float' = 0.0, min_gap: 'float' = 0.0, sudden: 'float' = 2.0) -> 'Dict[str, object]'; from the registry, opsdrive.get("lane_change_follower_decel"))

Usage

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

進路を変えた先の後続車が、自車に min_gap より近づかないために要る一定の減速度(閉形式、配列可)。場面 S072。

車間 `gap = 後続車の前端と自車の後端の距離(変えた瞬間)、後続車 v_follow、自車 v_ego(accel_ego` ≥ 0 で

加速し続ける)。後続車は `reaction` の間は速さを保ち、その後一定の減速。w₀ = v_follow − v_ego。

反応の間に詰まる量 = w₀τ − a_eτ²/2(相対速度が反応の中で 0 に届けば w₀²/(2a_e))。反応の後の相対速度

w₁ = w₀ − a_eτ、残り g₁ = gap − min_gap − (詰まる量)。要る減速度 b = max(0, w₁²/(2g₁) − a_e)。

反応の間にもう min_gap を割るなら ∞。`obstructs = b > sudden`(仮定 2.0 m/s²、26 条の 2 第 2 項「急に」)。

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_pass — py -3.11 examples/poc_driving_pass.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 (pass)

overtake_requirement · overtake_return_gap · no_overtaking_zones · overtake_permitted · overtaken_conduct_check · lane_change_permitted · roundabout_entry_check · roundabout_signal_point


*Provenance: drivepass.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.