Yet again, the northbound speed camera there has finished in top spot in terms of revenue over the last financial year.

Despite its presence being signposted it caught more than 7000 speeders across 2016-17, according to Office of State Revenue figures.

That equated to $1.72 million in revenue.

The camera is located just after the speed limit drops from 90km/h to 80km/h and the fines suggest people are taking their time to slow down.

There were 3070 drivers pinged for speeding less than 10km/h over limit, netting $379.134.

However, it was the 10-20km/h band where most speeders  – 4081 – were caught.

That accounted for 67 per cent of total revenue from the camera – $1.16 million.

The Centre for Road Safety executive director Bernard Carlon said the camera “continued to deliver a road safety benefit”.

“Since the northbound camera was installed there has been a 73 per cent decrease in casualty crashes at the location,” Mr Carlon said.

“Advanced warning signs are in place so motorists can check their speed and adjust their driving accordingly. Infringements issued at this location have fallen from almost 4000 per month in 2003 to about 1000 a month in 2015.”

While this might be the highest-grossing camera in the Illawarra, Mr Carlon said it did not feature on the list of highest infringing speed cameras listed in the 2016 Annual Review of NSW Speed Cameras.

Overall, the region’s red-light and speed cameras brought in $5,460,281 – and the M1 northbound camera alone contributed 31 per cent of that.

The red-light speed camera at the Gladstone Avenue and Crown Street intersection in Wollongong was second on the revenue list with $626,654 – from 1380 fined drivers.

Third on the list was the camera at Springhill Road, Spring Hill, monitoring southbound traffic, which brought in $388,645.

King Street, Warrawong, was in fourth spot with $349,492 and the controversial northbound camera outside The Illawarra Grammar School rounded out the top five on $312,628.

And the least effective camera when it comes to revenue?

That would be the northbound camera on the Princes Highway at Bulli, which picked up just $55,266 from 306 drivers.