The Project is the final phase of work that began approximately two decades ago to twin Highway 101 from Halifax to Exit 10 – Hortonville. The Project also includes the replacement of the aboiteau that was originally constructed in 1968-70 to better protect agricultural dykeland along the Avon River, protect the Town of Windsor and nearby communities from tidal flooding, and provide a route for the new Highway 101 and the Dominion Atlantic Railway.