Wheelchairs, guide dogs, and similar aids must be recognized

What it is

Recognition of mobility aids and service animals treats wheelchairs, walkers, white canes, guide dogs, and related aids as part of a person's mobility and safety envelope. The purpose is not identity labeling. It is to preserve room for turning, probing, braking, and animal guidance, and never route between a person and their aid.

Why it happens

Footplates, cane tips, and harnesses may be low, thin, or briefly separated from the torso, so upright-person detectors can crop them out. Aids change footprint, center of rotation, and stopping path; a service animal may lead the handler and adjust laterally. Treating each as an unrelated obstacle can split the coordinated unit, strike protrusions, or disrupt navigation cues.

Studying it

Scenarios should cross aid type, posture, material, occlusion, lighting, floor, and approach angle. Measures include recall of the joint occupied region, missed protrusions, trajectory continuity, closest approach, and crossings of the person-aid connection. Actual users should help define unsafe or disruptive paths; props and playback cover hazardous limits first.

Where it stops holding

Vision cannot reliably determine an animal's legal status and should not require health disclosure. Aid designs vary far beyond a few canonical dataset classes. If classification fails, general occupancy detection and conservative yielding must still protect the coordinated unit.

Applying it

• Fuse co-moving people, aids, and animals into a dynamic occupied envelope including protrusions, harnesses, and turning sweep.
• Prohibit routes through gaps between person and aid or animal; expand clearance and yield under uncertain classification.
• Test varied models, custom modifications, light and dark materials, partial occlusion, and crossing paths, recording part-level misses and disrupted guidance.

Related

• Same group: X5.06.1 Children and people with mobility impairments may move unpredictably · X5.06.3 Safety parameters must be set for the most vulnerable person
• Adjacent: X3.06 Communicating sensing range and blind spots · X5.02 Movement through shared spaces
• Search terms: mobility aid detection · service animal · joint occupancy envelope