How does SafeZone work?
A SafeZone installation generally comprises two elements: in-pavement warning beacons and the wireless controller (roadside) system. Because of this highly modular network arcitecture, design and deployment of a SafeZone system is relatively simple, especially compared to a hard-wired beacon system, where all lights, and lights and road-side controllers need to be connected via buried cables.
The control system can be either locally controlled, acting on local inputs (eg a signal from a train detection system, or from a pedestrian crossing activation system) or remotely controlled, responding to remote signals (eg from a road authority activating a school zone at a certain time of day).
Beacons are installed in the pavement - whether it be a private driveway, a pedestrian precinct where pedestrians and vehicles interact, a pedestrian crossing or a rail crossing - and wireless control units deployed so as to connect to local or remote inputs, and to provide radio coverage to the in-pavement beacons.
SafeZone In-Road/In-Rail Alert Devices (IRADs)At the heart of every SafeZone installation is an array of ultra-bright, flashing warning beacons – the SafeZone In-Rail/In-Road Alert Devices (or IRADs). IRADs are installed in a row, every 5 to 10 metres (depending on the application): • down the centre line and/or lane markers of a road
In this way, IRADs are not only far easier to see, they're far harder to obscure (eg by other vehicles, trees, etc). SafeZone IRADs are very compact (15cm across and 12cm deep) and highly ruggedised (rated to withstand 9 tonnes), and are available with Red, Amber or White LEDs, depending on the application. They come sealed, ready for installation, and can be deployed by a works crew after minimal training. In road and rail applications, only the top 2 centimetres of the dome is visible. In the case of railway platforms, a flush mounting model is available (ie, so as not to create a trip hazard). |
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SafeZone Alert Device Controllers (ADCs)ADCs are the wireless controllers that activate and monitor a local IRAD array. A typical installation comprises at least one ADC, and generally no more than three. An ADC can control any number of IRADs within radio range (generally 10 to 100), with their exact position and number being determined by the physical parameters of a specific location. ADCs are pole or building mounted; or can be installed on an existing sign (eg the warning sign on the approaches to a railway crossing). They can be solar or main powered, making them flexible and easy to install. Adding ADCs to cover a larger IRAD array means that a SafeZone system can be scaled to suit almost any application; and can be upgraded by simply adding more ADCs and IRADs, should circumstances require it. |
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