Guiding Principles Grade-separated Crossings At-grade Pedestrian Crossings Electronic
Audible Traffic
Smart Device
for the Elderly and
the Disabled
Pilot Real-time
Adaptive Traffic
Signal System
Auxiliary Devices to Enhance Pedestrians' Safety at Road Crossings


1.  Introduction

The function of electronic audible traffic signals (eATS) is to provide indication to the visually impaired persons (VIPs) on the prevailing pedestrian signals.  The eATS currently installed on street is capable of responding automatically to the ambient noise level.  Its output is automatically higher under noisy environment and lower if the environment is quiet.  The eATS can provide clear audio messages to the VIPs while minimizing the noise nuisance to the nearby residents.  The eATS is also equipped with a tactile unit which indicates the prevailing pedestrian signal states by means of different vibrating patterns.

Photo of Electronic audible traffic signals


2.  Components of eATS

The eATS comprises :-

(i) Audible unit; and
(ii) Tactile unit with or without push button function

3. Audible Unit

4. Tactile Unit

Photo of Tactile Unit Vibrating device
Tactile unit Vibrating device with directional arrow

5. Tactile unit with push button function

 Photo of pushbutton   Photo of pushbutton


6. New generation eATS

Two types of new generation eATS

New Tactile Unit in Trial New Push Button in Trial
without push button*

with push button*

New Push Button New Tactile Unit
with push button

without push button

* Devices currently under trial