Wireless Pedestrian Crossing ('PANDA') System - Implementation
A PANDA Crossing System comprises is basically comprised of two elements, ie:
The PANDA beacon units are generally installed on the road-side, 6-20 metres in advance of the crossing. They are also generally installed in pairs, ie one for each side of the road (facing on-coming traffic).
They are supplied as two types, where:
The optional in-road beacons (IRADs) are generally installed down the road centre line (in 2 lane carriageways) as well as down the lane meakers (in 3 lane carriageways), spaced 4-6 metres apart, starting at the road-side PANDA beacons, and stopping at the crossing.
Once installed, the PANDA beacons can be activated a number of ways:
A system that is manually activated for use by pedestrians will flash for 30 seconds, then turn off. Time-outs can be selected at the time of installation (eg, longer durations can be applied for a road that is wider, eg a 4 or 6 lane carriageway).
An automated system can be set to flash for a set time, eg throughout school zone times (8.00-9.30am & 2.00-3.30pm, Monday to Friday during school terms). Additional fail to safe logic can be applied (eg if the pedestrian activation switch fails or is vandalised).
Because PANDA operates using a security coded wireless network, multiple systems can be co-located by selecting different encyption 'keys' for each system (eg where crossings may exist on adjacent parallel or intersecting roads). They can then be activated separately using the desired activation method.
An optional 3G module allows remote monitoring and fault finding, or system re-programming if required (eg to change flash duration, cycle times, time-outs, etc).