Fines for speeding are set to double to €160 from midnight tonight.
The penalty for using a phone while driving is also set to double, from €60 to €120.
123 people have been killed on Irish roads so far this year, up 12 on the same time last year.
Chairperson of the Road Safety Authority, Liz O'Donnell, says they're determined to change drivers' attitudes to speeding:
"A third of people admit to breaking the speed limits routinely and that blasé attitude to breaking the speed limit and driving at an excessive speed for the for the road and for the speed limit that is illustrated. It's really worrying and we're trying to just get the message across to people that if you speed you're much more likely to have a serious crash. When you have that crash, it's more likely that people will be very seriously injured, the faster you go."
