Six people have been killed in six separate collisions in the last 36 hours on Victorian roads and police say most of the accidents could have been avoided.

Assistant police commissioner Robert Hill says the increase in single vehicle collisions shows drivers, particularly on country roads, are becoming complacent.

Mr Hill says the whole community should be thinking about the affect the deaths have on families, children and friends and doing everything they can to ensure their loved ones come home safely.

But he says people just seem to be accepting the toll.

The state's road toll stands at 39, compared with 46 at the same time last year.

AAP