The number of speed cameras on WA roads is set to triple under new government plans.

The number of fixed cameras will grow from five to 30 and the number of red-light cameras will rise from 30 to 90 over five years.

The number of fixed cameras will grow from five to 30. Credit:Kirk Gilmour

Road Safety minister Liza Harvey said the move would bring the state more in line with New South Wales and Victoria.