Manx Utilities has rejected claims it failed to properly assess traffic impact before closing the roads at White Hoe.
Jason Moorhouse had questioned why vehicle flow data was not collected prior to the full road closure, which was necessary for replacement of a large underground valve chamber cover.
He suggested there was an inconsistency compared to data gathering in the south of the island for potential turbine routing.
But chairman John Wannenburgh told Tynwald: “There were no traffic counters placed at White Hoe since it is not on the proposed route for transporting wind turbines to the Earystane site.”
Timings
Mr Moorhouse also queried why the road could not have been left open on the morning of Monday March 9, when works did not appear to begin until late morning, causing disruption for buses.
Closures that morning left commuters facing long delays to get into Douglas.
Mr Wannenburgh confirmed the closure was implemented at 6.30am, with covers lifted and site set up from 8am.
He said the works were planned months in advance and the application submitted six weeks prior.
“The planned bus strikes could not have been foreseen at this time, and any change to the programme requested by Manx Utilities at short notice would, of course, increase further cost and would have resulted in pushing the timing into a period of even greater disruption,” he added.