The main St John's to Peel Road reopened at lunchtime, following an accident involving three vehicles.
It happened near to the Ballaharra Quarry at about 8.15am.
Police closed the road between the juntion at Station Road, St John's and Queen's Drive in Peel for over three and a half hours while they dealt with the incident.
Sergeant Stuart Gardner from Peel police told Manx Radio he didn't believe the heavy overnight rain was a contributory factor:
'Divisive' clause five removed from new local authority legislation
New law will improve transparency and update bylaw procedures
Campaigner urges Island to pilot recreational cannabis scheme
Charlotte Caldwell believes there is political support for a new approach to cannabis
Funding model 'constraining' ability to tackle heritage 'critical maintenance backlog'
MNH outlines issues with Treasury support
Ramsey Commissioners appeal for help after fly tipping incident
Any information received 'will be treated with the strictest confidence'
Pothole claims cost department thousands
Hundreds of successful compensation claims in recent years confirms minister