Almost half of the fines issued by the hardest-working speed camera in the city are for low-level speeding offences, according to government data.
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But some hoons are driving past the camera at high speeds.
The northbound camera on the M1 Motorway at Gwynneville - revealed as being in the top 10 for infringements in NSW - is easily the busiest in the Illawarra.
In the 2018-19 financial year it issued 8177 infringement notices, according to Office of State Revenue data.
That's more than double the next busiest camera, on Windang Road.
A large number of those 8177 infringements were for motorists travelling less than 10km/h over the posted 80km/h speed limit.
Forty-one per cent of the infringements - totalling $435,000 of the camera's $1.9 million in revenue - were caught in this speed band, copping a $121 fine and one demerit point.
The worst offenders are those in the 10-20km/h band, which suggests drivers having difficulty reacting to the drop in the speed limit from 90km/h to 80kmh just before the camera.
That band accounted for 54 per cent of the infringements at $1.3 million in fines.
The presence of the money-spinning speed camera didn't stop some motorists from clocking speeds greater than 20km/h over the limit.
Overall 311 motorists were pinged for going more than 20km/h over the limit past that camera.
Of those, 286 drivers flew by the camera at speeds of between 100km/h and 110km/h, accounting for $146,000 in revenue.
That bought them a $481 fine and four demerit points.
Twenty motorists managed to speed more than 30km/h past the speed camera - which brought in a total of $21,000 in fines.
But there were still worse offenders - five of them in fact.
Those five drivers managed to floor it and reach speeds of more than 125km/h as they passed the camera.
For their actions, they would have received at $2482 fine in the mail and six demerit points.