Tasmania Police's annual Operation Crossroads has seen two fatal crashes since last Monday. 

Yesterday a 21-year-old Trevallyn man died instantly when his bike was hit by a passing ute on the West Tamar Highway.

And on Friday a German tourist died after the vehicle she was a passenger in ran off a gravel road and over a steep embankment in the Leven Canyon area.

There have been five serious crashes.

Three required first aid but the others resulted in no apparent injury. 

The blitz has recorded a six per cent increase in the number of vehicles detected speeding compared to last year's operation.

The Christmas Holiday Road Toll reporting runs annually from December 23 until midnight this Friday.