Motorists caught parking on footpaths, cycle tracks and bus lanes will see increased fines from next month.
The Minister for Transport has signed regulations which will double the fine from €40 to €80 from 1 February.
Eamon Ryan said the measure would promote active travel and encourage "a more considerate use of road space".
"Parking on footpaths puts vulnerable pedestrians, such as wheelchair users and those pushing buggies, at significant risk by forcing them off the footpath and into traffic," he said.
Mr Ryan said parking on bus and cycle lanes endangers cyclists and undermines investment in public transport.
"These increases should help improve the safety of all vulnerable road and footpath users, by creating a more effective deterrent to these specific forms of illegal parking," he added.
Minister of State with responsibility for Road Safety Hildegarde Naughton said the Government is investing almost €1m per day on "active travel infrastructure" projects across the country.
