I haven't been able to find much more information apart from the press release at http://www.digitalsignageconnection.com/australian-road-and-maritime-services

I haven't been able to find much more information apart from the press release at http://www.digitalsignageconnection.com/australian-road-and-maritime-services-installs-traffic-signs-electronic-ink-850 http://www.digitalsignageconnection.com/australian-road-and-... From what I can see, nothing specifically states that the signs are intended to be changed extremely frequently, nor that the information displayed is strictly for right now. With good design and usage, issues like not knowing if you will be able to park in the signposted area in two hours time become less likely. The ability to change the signs frequently doesn't mean that they will. The examples shown tended to be things like * No parking during Sunday markets * No parking from 3pm - 11pm on a special event day Obviously these could be abused, or used poorly, but I wouldn't say that they are bad because of that fact.