A driver was subject to abuse and "gestured at" during a suspected "road rage" incident on Wednesday morning at approximately 10:15am.
Both the driver and the alleged aggressor were travelling from Ratoath Co Meath to the Ninemile Stone Roundabout "where it came to a head".
The driver of a brown coloured Peugeot Van got out of the vehicle and abused and gestured at the other driver.
Gardai are investigating the incident and have said potential witnesses or dash cam footage would be welcomed.
They have asked members of the public who can help with the investigation to contact them on 01 8010600.
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