After six months of preparatory work to the lineside and structures along the route, work to erect stanchions and string overhead power lines can now begin. It will take until next spring to complete.
The £40m scheme will see more than 50km of railway electrified as part of a wider £80m investment in the line between Cumbernauld and Glasgow.
As well as the main electrification works, the project will also be lengthening the Cumbernauld station platforms and constructing a turnback facility at Springburn.
The project marks the first phase of electrification on the Edinburgh-Glasgow Improvement Programme (EGIP), and the scheme will be delivered in time for the Commonwealth Games in 2014.