Tomic, who started the year in good form by winning the Sydney International title, was reportedly driving his yellow Ferrari at 78kph in a 60kph zone on Australia's Gold Coast.
Around the same time last year Tomic made headlines after he refused to stop for police while driving a high-powered orange BMW, leading to a bizarre stand-off with officers outside his home.
The 20-year-old was subsequently found guilty of four traffic offences at Southport Magistrates Court in November and was issued with a 12-month good behaviour bond. The player also pledged to concentrate on his tennis.
If found guilty of the latest offence, he is likely to lose his driving licence.
Just like 12 months ago, Tomic is coming off an encouraging performance at his home Grand Slam. The Australian number one reached the third round in Melbourne earlier this month, where he was beaten by eventual semi-finalist Roger Federer, but appeared to deliver on his promise of improved form on the court.
Last year, Tomic delighted home crowds with his run to the fourth round, taking in victories over Fernando Verdasco, Sam Querrey and Alexandr Dolgopolov before being halted, again by Federer.
His success in Sydney in the run-up to this year's Australian Open was his first ATP Tour title and hinted his off-court problems were perhaps behind him.