New red-light speed cameras were installed along Memorial Drive at the Railway Street and Towradgi Road intersections earlier this year.

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They replace the fixed speed cameras located on Memorial Drive between the two intersections

On June 24, the cameras were switched on and - in line with Transport for NSW policy - they operated in warning mode for the first month.

Instead of being slapped with a fine for speeding or running a red light, motorists just received a warning letter in the mail.

But that all ends on Friday, when offending motorists will lose points on their licence and be hit with a fine.

If the first month was any indication, the two intersections could catch hundreds of motorists each month - more that 200 warning letters were sent out from June 24 to this Friday.

"Since the camera has been switched on, 83 letters have been sent to motorists for incidents relating to the southbound camera at the intersection with Railway Street at Corrimal and 124 warning letters have been sent to motorists for incidents at the intersection with Towradgi Road at Towradgi," a Transport for NSW spokeswoman said.

The decision to switch off the fixed cameras and replace them with red-light speed cameras at both intersections was a result of their crash history.

In the five years from 2014 to 2018, 20 crashes occurred at the Towradgi Road intersection and 15 people were injured, three seriously.

During the same time period, 11 crashes occurred at the Railway Street intersection and nine people were injured, two seriously.

"These new cameras will target high-risk behaviours at the intersections and enforce speeding and red-light running for both north and southbound traffic on Memorial Drive," said Executive Director of the Centre for Road Safety Bernard Carlon.

"We know that running red lights can lead to serious T-bone crashes or vehicles crashing into pedestrians."

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