They're also appealing for help after a theft from a van.
Gardaí are investigating incidents of dangerous driving in Laois.
A motorist was arrested following the incident in Stradbally at approximately 7 o'clock yesterday morning.
Anyone who passed through the area of Stradbally and the Windygap is asked to contact Portlaoise Garda Station.
Gardaí are also appealing for help in identifying the occupants of a White Volkwagen Passat Estate with a chrome roof rack.
They were seen acting suspiciously near a van, which had tools stolen from it, in Birr at 8.30 last night.
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