Jodie Thurling said she prefers that her teenagers ride trail bikes in nearby Star Park because otherwise they wouldn't have anything to occupy their time.

``It's better than having them hanging around on the streets and getting into trouble,'' Ms Thurling said.

But a Rossmore resident who lives near the park, but who did not wish to be identified, contacted the Advertiser to complain about the noise caused by the trail bike riders.

``They're there every afternoon and all day on the weekends it's very disruptive to people living here,'' he said.

``It's dangerous for children that use the park and they go on the roads too, so it's a traffic hazard.''

Ms Thurling said she knows it is illegal to ride the unregistered trail bikes in parks, especially since her children don't have licences.

``But I make sure they're wearing all the safety gear and I don't let them ride on the roads,'' she said.

``It's not hurting anyone and at least it gives them something to occupy their minds.

``There used to be a skate ramp at Austral, but now the council's shut that down, so they don't have anything to do with themselves.

``And the closest place where they can ride legally is in Appin, but that's just too far away for us.''

Fairfield police highway patrol is responsible for traffic matters in Rossmore and throughout the Green Valley police area.

Sergeant Scott Finlay said trail bikes are a problem throughout the region.

``But it's often difficult for us to stop these kids, because they're more mobile and can get away from us, in our V8 cars, quite easily,'' Sergeant Finlay said. ``It's dangerous, especially when they're riding on the streets. And the bikes cause a lot of damage to local sporting grounds, which then need to be repaired.''

When asked if Fairfield highway patrol planned to introduce a trail bike team, similar to the one established by Liverpool police, which provides officers with trail bikes to chase illegal riders, Sergeant Finlay said that was in the works.