"The vehicle safety message is just not getting through to motorists and governments.
"We should be embarrassed by these statistics. They are simply unacceptable."
Victoria police say the summer safety campaign will target speed, distracted drivers and drink and drug drivers.
"We will be moving our drug and alcohol buses into urban and regional centres and locking down entire areas," said the state's head of road policing, Deputy Commissioner Kieran Walshe.
"We all know what the key risks are - speed, alcohol and distraction. Stay alive this summer and stay away from the risks."
Police will also be entitled to visually inspect vehicles they pull over. Drivers of vehicles found to be unsafe or unroadworthy will be served defect notices.
"There are more unsafe vehicles on our roads than people realise," Purchase said.
"Our final vehicle safety figures for the year make disturbing reading."