Research conducted by the Road Safety Authority has found that more than 60% of motorists support the use of mobile speed cameras.
That figure is up almost 20% compared to six months ago.
The survey also found that 85% of motorists believe the cameras make the roads safer and save lives.
However, the RSA says half of all motorists believe they can safely exceed the speed limit on national roads and that this attitude is particularly high among those who drive for work.
Almost 70,000 people have been caught speeding since the start of the year.
They have been detected by speed checks operated by gardaí and private company GoSafe, which operates the mobile speed cameras.
The RSA and Minister for Transport Leo Varadkar have appealed for people to drive safely this Easter weekend.
Gardaí say they will be active over the holiday period and will be focusing on drink and drug driving, speeding and the use of handheld mobile phones while driving.