I am advised:
In the two weeks leading up to the speed limit change, Transport for NSW (TfNSW) installed electronic message signs at twelve locations along this stretch of road, to provide advanced notice to motorists.
The NSW Police Force also regularly conducts speed monitoring and enforcement activities along this stretch of road, through scheduled tasking or while on the way to other tasks.
TfNSW issued a media release to local media outlets, which resulted in coverage in local newspapers, television and radio. The Centre for Road Safety also distributed an email update to subscribers.
TfNSW displays ongoing road safety messages, including speeding messages, via two overhead fixed message boards located on Newcastle Road, Broadmeadow and Thomas Street, Wallsend.