A ban on traffic outside a school in Malahide has seen pollution drop by 20% in the area.
Fingal County Council brought in the rule outside St Oliver Plunkett's National School in an effort to encourage kids to use "active travel".
A survey shows there has been a 50% increase in the number of pupils who now walk, cycle or scoot to school.
More Options Needed
Oisin Coughlan, director of Friends of the Earth, is impressed by the result of this pilot scheme.
He said: "It shows how much pollution children were being exposed to on a normal day when there was no restriction on traffic."
Mr Coughlan would like to see the scheme rolled out at other schools.
But he says there needs to be more options for travel to encourage people to leave the car at home.
He said: "We need to look at cycling safely, walking safely and public transport investment so the option is there for more and more people to use something other than the car to get to school."
