WA’s top traffic cop has told motorists police “will pop up when they least expect us” over the Australia Day long weekend.

A 17-year-old and a 24-year-old have been arrested and charged by police in separate incidents where they were caught driving at speeds of more than 100km/h in a worrying start to the long weekend.

Motorists caught breaking the law this Australia Day long weekend are being warned that they could face double demerits and hefty fines.

West Aussies heading down south have caused chaos on a major Perth freeway, with motorists warned to allow for extra time. On Friday afternoon, the Kwinana Freeway southbound was bumper to bumper as ...

Christmas is one of the most dangerous time of the year on the roads, prompting many states to enforce double-demerit points ... followed by Sydney and Perth, where a mobile phone is detected ...

Followed categories will be added to My News. Double demerit penalties were adopted by several states to encourage people to drive safely on long weekends and public holidays, when road fatalities ...

Double demerit points will apply for the duration of the Australia Day long weekend operation, which began after midnight on Friday.

Authorities in some Aussie states have long believed in the power of double demerits in keeping drivers safe during busy holiday periods, but some researchers believe there's not enough evidence ...