The extensive work. if approved by Tynwald members, will mean delays for motorists for over a year as the route, the main road from the west into the capital, is put back into shape.
However there will be a bonus for those on two wheels.
Part of the old road will be recycled and used to give the old railway line from Douglas to Peel a better surface.
Director of Highways Richard Pearson:
King to visit the Isle of Man
It will mark His Majesty King Charles III's first appearance as Lord of Mann
Court for taxi driver accused of asking customer to perform sex acts
45-year-old accused of causing 'public outrage'
Kewaigue Hill set to close for three days later this week
It is for repositioning of pipework
Local branch of charity donates £2000 to those affected by Venezuela earthquakes
Thousands injured or left without homes after disaster