The device is suitable for being installed within controlled pedestrian crossings in order to signal blind people the possibility to go-ahead.
The mentioned device is can have the following features:
The two units that are installed in either side of the pedestrian crossing can be connected to one another, so that upon a request, the acoustic signal for going-ahead can be issued on both sides of the crossing.
The acoustic unit is installed inside its own box mounted one on the traffic pole's head above the relevant pedestrian signal heads, the other, for the request, on the pole's front.
the calling device can be used by two kind of users, common pedestrians and blind people. The request made by common pedestrians is signaled to the traffic controller so that it can either carry it out, introducing inside the traffic signal cycle the desired phase, and so that it can send a feedback signal used by the device for activating a luminous signal for confirming the accepted request. The request by blind people may be done: