Point-to-point cameras on the Forrest Highway have detected 14 speeding motorists in the first 12 hours of fines being issued.
The highest speed detected yesterday was 145km/h in the 110 zone between Lake Clifton and Binningup.
The highest average speed was 130km/h.
Earlier trials indicated almost one third of drivers within a three month period were speeding along that stretch of road.
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