rss_worst_case_gap — DRIVE `rss` op

• Data kinds: table → table

• Call: import fullseye as fs; fs.ledger.rss_worst_case_gap(d0: 'float', v_rear: 'float', v_front: 'float', p: 'dict', p_front: 'Optional[dict]' = None, dt: 'float' = 0.001, t_max: 'Optional[float]' = None) -> 'Dict[str, object]' (to call the implementation directly, import rsssafety; rsssafety.rss_worst_case_gap(d0: 'float', v_rear: 'float', v_front: 'float', p: 'dict', p_front: 'Optional[dict]' = None, dt: 'float' = 0.001, t_max: 'Optional[float]' = None) -> 'Dict[str, object]'; from the registry, opsdrive.get("rss_worst_case_gap"))

Usage

Tracks the same-direction worst case (paper Definition 4) over time.

The leading vehicle decelerates with brake_max from t = 0 until it stops. The following vehicle uses accel_max during ρ (capped at v_max_accel), then decelerates with brake_min until it stops. Positions at each time use the exact piecewise constant-acceleration formulas, and the time series always includes ρ, the capping time, and each vehicle's stop time (dt is only the display density; min_gap does not depend on dt).

Returns

dict : t, x_rear, x_front, v_rear, v_front, gap (ndarray), min_gap, t_min (float),

collided (min_gap < 0), t_stop_rear, t_stop_front. gap = x_front − x_rear

(gap between the front end of the following vehicle and the rear end of the leading vehicle; the follower starts at x = 0, the leader at x = d0).

min_gap = d0 − max(d_min − min_distance, 0) holds (d_min = rss_longitudinal_same).

Giving t_max truncates (before both vehicles stop).

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_ttc_rss — py -3.11 examples/poc_ttc_rss.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 (`rss`)

rss_params · rss_stopping_distance · rss_longitudinal_same · rss_longitudinal_opposite · rss_lateral · rss_longitudinal_check · rss_lateral_check · rss_worst_case_gap_opposite

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

rss_worst_case_gap — DRIVE rss op