Residents in the Ards and North Down Borough Council area now have to book in advance before using household recycling centres.
Some recycling centres in Northern Ireland operated similar booking systems during the Covid-19 pandemic.
But Ards and North Down is the first council to introduce it at all sites, on a permanent basis.
Bookings can be made online or by telephone, up to 30 minutes before an allocated time.
The council believes that by managing access there will be a reduction in queues at busy times, and an overall increase in recycling.