New road rules will come into effect around Australia, most of them specific to individual states.

Here’s everything you need to know about the changes coming into effect on Tuesday.

As part of the expansion of Road Rule 79A, drivers in Victoria will be required to slow down to 40kmph while passing some roadside vehicles from July 1 or face fines up to $961.

That includes assistance vehicles, tow trucks, and emergency incident response vehicles that are flashing lights or sounding their alarm on any roads.

Motorists in SA are required to slow down to 25kmph while passing stationary roadside, emergency, or breakdown vehicles flashing their lights on multi-lane roads.

Failure to comply may incur fines of up to $1895 and up to nine demerit points.

Hundreds of roads across WA will have their speed limits reduced, with some dropping from 60kmph to 50kmph and others in high pedestrian areas going as low as 40kmph.

Harsher penalties will also apply for illegal mobile phone use and extreme speeding, with fines up to $700 for the former and $1600 for the latter.