The number of speeding tickets handed out last year was nearly double the amount issued the previous year, police figures reveal.
Police gave out 627,948 tickets for speeding infringements in 2010, compared to 329,838 in 2009.
The 2010 figure was more than 200,000 above the four year average for tickets issued.
In the first four months of this year, the country's 55 cameras had captured 200,671 incidents of speeding.
National road policing manger Superintendent Paula Rose defended the rise in tickets issued and dismissed claims tickets are a form of revenue gathering.