Final answer:
Audible pedestrian crosswalk signals have directional beacons that emit sound signals to assist visually impaired pedestrians in crossing the road safely.
Step-by-step explanation:
The feature of audible pedestrian crosswalk signals is directional beacons. These beacons emit sound signals and are commonly found at intersections to assist visually impaired pedestrians in crossing the road safely. The signals provide auditory cues, such as repeating beeps or chirps, to indicate when it is safe to cross.
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