Around a thousand tyres have been dumped along the road in north Dundalk
Local coucillor Antóin Watters said people dumping tyres in the are has become a "scourge" in recent years.
The Sinn Fein councillor said on Twitter: "At least 1000 tyres dumped in the lay-by along the N1 Dual carriageway.
"It looks like it could have been done in a number of drops.
"Tyre dumping in this area has been a huge problem the last number of years and a scourge for our area."