Three dead in Vic truck collisions

A workman setting up for the day is one of three men killed in just four hours in Victorian collisions involving trucks.

Five workmen were setting up a roadside worksite at the town of Newham in the Shire of Macedon Ranges when one was fatally struck by a truck at about 7am (AEDT) on Wednesday.

A 48-year-old man has been arrested over the death.

The incident followed the death of a truck driver, aged in his 20s, who clipped a tree and power pole then went through a fence and into a parked car in Hampton East, in southeast Melbourne at 5.30am.

A motorcyclist died when he collided head on with a truck at Bung Bong, near Maryborough, just after 9am.

Police said the 46-year-old truck driver was helping police.

Victoria's road toll stands at 65, compared to 59 at the same time in 2013.