The purpose of Accessible Pedestrian Signals (APS) is to communicate information about the WALK and DON’T WALK intervals at signalized intersections, in non-visual formats, to pedestrians who are blind or have low vision. The policy of TE is to install them when requested, in writing, as part of a citizen's need, due to a visual handicap. Staff members are then able to personally meet that individual in the field to determine accessibility routes/ intersections so that we can provide the best /most reasonable route that can support the audible buttons. Below is a feature that communication did in 2016 regarding this exact matter; https://cityblog.huntsvilleal.gov/walking-a-mile-in-their-shoes/

While it would great to install Accessible Pedestrian Signals (APS) at all pedestrian-accessible intersections in the City, it is not feasible to retrofit all intersections that do not have APS. Not all intersections can be upgraded with the devices if they do not meet the criterion. Please be advised that the current intersection, as part of the signal timings that TE undertook and finished in Dec 2021, Traffic Engineering upgraded pedestrian crossing times to ensure adequate crossing signs as required by the Institute of Traffic Engineering. This timing falls in line with the Manual on Uniform Traffic Control Devices (MUTCD). The manual does not require additional “cues” for a pedestrian to be advised that the signals are operational. As long as the buttons are functional or the pedestrian signals are working as intended, then that is the appropriate device/mechanism for pedestrians to cross at an intersection.