Road crash risk greatest on Xmas Eve

There's an eight-hour period on Christmas Eve when you're most likely to have a road accident.

That's according to Tasmanian police, who are warning drivers to be extra careful after noon on Thursday.

"The most likely time for a crash to occur during the Christmas and New Year period is on Christmas Eve between midday and 8pm," assistant commissioner Donna Adams said on Wednesday.

The danger period was identified by examining Tasmania's crash statistics from the past five years.

Tasmania police will on Thursday launch the state's holiday season road safety campaign, which will run until January 2.

They will be targeting speeding, seatbelt compliance, drink- and drug-driving, inattention and fatigue.