I only saw this advertised on TV once, so thought I'd mention it here. I'm in NSW but I think the law applies nationwide, you may have to check with other states.
From 1 September 2018 motorists are required to slow down to 40km/h when passing stationary emergency vehicles displaying red or blue flashing lights.
The rule applies to vehicles travelling in both directions, unless the road is divided by a median strip.
Motorists who ignore the new speed limit will face stiff penalties, including a $448 fine and the loss of three demerit points.
Source:
https://www.transport.nsw.gov.au/ne...low-down-for-flashing-lights-from-1-september
Andrew