The man in his 40's was pronounced dead at the scene and gardaí say no other injuries were reported.
Gardaí are appealing for any witnesses, particularly any road users with video footage (including dash cam) and who were travelling in the area at the time to come forward.
Anyone with any information is asked to contact Wicklow Garda Station on 0404 67107, the Garda Confidential Line on 1800 666 111, or any garda station.
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