AT least $1.3 million would have poured into Victoria's coffers if drivers had been punished for speeding on Peninsula Link in the last fortnight.

More than 7500 leadfoot motorists were busted during the two-week trial of new speed cameras, including 500 clocked at more than 15km/h over the limit.

Some 66 drivers would have lost their licences.

Six hoons would have had their vehicles impounded after flying along Peninsula Link at more than 45km/h over the limit.

But none of the offenders were punished because the cameras were only being trialled.

Speeding fines start at $180, meaning the State Government could have reaped at least $1.35 million if the cameras were switched on.

But the Peninsula Link cameras are set to go live within the next fortnight, with two point-to-point sections and three instantaneous detection points in each direction.

Victoria's top traffic cop, Assistant Commissioner Robert Hill, said it was another reminder for drivers to pay attention to the speed limit.

"We are giving motorists advanced warning that the cameras are going to be activated soon," Mr Hill said.

"Cameras help to reduce death and road trauma on our roads and are an important part of our overall enforcement approach."

"This is a reminder to motorists to slow down, pay attention and make sure you are driving within the signed speed limit at all times."

Mr Hill said speed was a major factor in a third of fatal road collisions each year.

"Low level speeding can be just as dangerous as high-level speeding, so it is concerning to see around 5000 motorists exceeding the speed limit by less than 10km per hour," Mr Hill said.

"Speeding drivers increase the risk to all road users with the potential for devastating consequences."

Signs will be placed along Peninsula Link from today, carrying a message saying "cameras enforcing soon".

That message will change to "cameras enforcing now" when the cameras are switched on during the week beginning September 16.

tom.minear@news.com.au