Data Signs offers STREAMS message boards. Current DataSigns-VMS are certified to be used with STREAMS (as of September 2016).
STREAMS is used by various Road Authorities to control fixed and portable Signs and other devices on roadways, as part of an Intelligent Transport System (ITS). The STREAMS platform has been developed by a company called Transmax, who are based in Queensland, Australia. From their website: “Transmax is a full-service Intelligent Transport Systems (ITS) solutions provider that develops, deploys and supports the international award-winning ITS Platform STREAMS.” See more about Transmax at www.transmax.com.au.
STREAMS is made up of two parts:
In the case of Portable devices such as the DataSign-VMS, the Field Processing Unit is usually located in an office. A 4G Modem is plugged into the Field Processing Unit. A corresponding 4G Modem is then plugged into the RS232 plug in the VMS Control Box on the DataSign-VMS. Both modems communicate over the mobile internet. As suggested by a Transmax representative, fitting a Field Processing Unit to a portable VMS is not practical as they have very high power consumption.
Setting up STREAMS
Manufactures of various devices used on the roadside that wish to connect their device to STREAMS, must have the device certified as compliant by Transmax. Transmax charge a fee to test each device with the manufacturer. If testing is successful, Transmax issue a compliance Statement of Support once all testing is successful.
Data Signs Pty Ltd was issued with a Statement of Support for STREAMS compliance for the RM32 Sign Controller on 26th June 2013. Important: This was specific to TSI-SP-003 protocol version 2.1.
If your DataSign-VMS is online on the Data Signs WebVMS2™ portal and then it is connected to STREAMS, the DataSign-VMS message display cannot be updated from WebVMS2™. The DataSign-VMS is updatable either from STREAMS or WebVMS2™ - not both at the same time. You will still be able to view the GPS location and other details of the DataSign-VMS on WebVMS2™, however in order to put a message onto it from WebVMS2™, the STREAMS modem needs to be physically disconnected.