Location of Walk Indications Separation of sound sources Ambiguity can be addressed by careful location of signal sounds.
The best solution is location of the speakers precisely beside or above
the end of associated crosswalks, and at least 3 m (10 ft) from another
APS on the same corner, so it is clear from the source of the sound which
crosswalk is being signaled.
Ideal placement
for pushbutton-integrated APS.
Speech messages, if sound sources cannot be
separated
If the APS must be located with two pushbuttons on the same pole or in
locations that are not separated by at least 3m (10 ft), one alternative
recommended by PROWAAC is that APS have speech messages. To provide unambiguous
information such APS require:
A tactile arrow aligned with the associated crosswalk;
A pushbutton message available during the flashing and steady DON'T
WALK, that identifies the intersection and the crosswalk associated
with that pushbutton; and
A WALK message that includes the name of the street being signaled
at the onset of the Walk interval. (Otherwise the speech message is
not useful to those unfamiliar with the area.)
Possible additional solutions
Further developments in technology which may provide clarification of
which crosswalk is being signaled, may include
Alternating the WALK signal from one end of the crosswalk to the
other
Having the WALK signal come from the far end of the crosswalk only
