A motorbike rider who police say was trying to avoid the rain by speeding home was allegedly caught travelling more than 40 kilometres over the speed limit in Brisbane on Friday.

The woman was pulled over by police officers about 4.30pm travelling 42 kilometres over the 100km/hour speed limit along the Pacific Motorway at Tanah Merah.

The 37-year-old Rochedale South woman was issued with a $1137 speeding fine, $406 fine for unlicensed riding and a $121 defective vehicle fine, along with nine demerit points.

On Thursday, Commissioner Ian Stewart said excessive speed continued to be a significant issue in Queensland, with about one in four road fatalities involving a speeding motorist.

"Speed management and enforcement remains a priority for police as we do everything we can to create a safer environment on our roads," he said.

Motorists have been urged to slow down during the Christmas holiday period after the road toll from December 9 reached 16 on Thursday.

Road Policing Command Assistant Commissioner Mike Keating said motorists could expect a "saturation" of speed enforcement across the state.

"We all know that during the Christmas break there are a lot of people travelling, leading to a high volume of traffic on roads across Queensland and an increased risk of crashes," he said.

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