Its absurd to think that traffic fines are any substantial part of the budget but here you go, I did 2-3 minutes of research for you.

In the 2023-24 financial year, fines issued from road safety cameras amounted to $473 million. This figure represents a fraction of the overall cost of speed and distracted driving and seatbelt-related crashes. Link

The total state budget is 111.7 billion. Link

ie. Around half of 1%

I used victoria just because when i typed “traffic camera revenue” into DDG it was the second result.