Police are ramping up road surveillance this long weekend as Bendigo's roads become a thoroughfare for holiday makers.
They will use automatic recognition technology to take photos of number plates which they will scan through a separate system to check drivers' records.
Constable James Vereker said the technology enabled police to see if the owner was unlicensed, suspended, disqualified or had any outstanding fines.
Police were stationed on Napier Street near Lake Weeroona on Friday.
"We impounded one vehicle and detected four suspended drivers, three unregistered vehicles, three unlicensed drivers and one using their mobile phone," he said.
The sherriff detected outstanding fines worth $200,000 owed to the state government.
"One person had $15,000 (of unpaid fines) just to them," Constable Vereker said.
He said police expected a busy weekend.