Intelligent Roadway Information System
A portable DMS can have an associated GPS (global positioning system) receiver. This allows the sign to be tracked and automatically updated with the nearest roadway and direction.
To create a GPS device, select the DMS and open its
Properties form. On the
Location, there are controls for configuring the associated GPS. Once the GPS
is enabled, it must be associated with a controller. Its name will be the same
as the DMS, with
_gps appended. For NTCIP, the GPS should be associated
with the same controller as the DMS (using pin 2). For RedLion or SierraGX,
a new comm link and controller must be created to communicate with the modem.
The GPS will be polled once every 5 minutes, unless on a
Modem comm link. In
that case, the comm link period will be used. The
Query GPS button can be
used to manually poll the coördinates.