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QLD Dept of Main Roads
The Queensland
Department of Main Roads uses the Maxon Modmax
modem as part of the communications system for
their Weigh in Motion traffic data collection
sites. Weight in Motion traffic data collection
sites are used to collect traffic information,
including vehicle speed, length, weight and
classification (car, bus, truck, road-train,
etc). Some of these sites are located in remote
areas where network coverage may be an issue.
High gain antennas are used at all sites to
assist in strong signal strength. The sites are
dialled on a daily basis using a
circuit-switched data call to retrieve data from
the traffic loggers.
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A diagnostics system has been implemented,
including a Maxon Modmax modem connected to a
Solaris server. The systems takes advantage of
the Maxon Modmax SMS remote control commands,
which returns all modem information after
receiving an SMS. A Java program interrogates
the database for modem phone numbers and sends
an SMS to each field modem. The program then
interprets the return SMS from each modem, and
populates the database with modem information
including input voltage and signal strength.
http://www.mainroads.qld.gov.au/
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