The Project involves infrastructure upgrades to three GO Stations, as well as a new grade separation at Steeles Avenue along the rail corridor. Upgrades include:

• Milliken Station: new and relocated platforms with canopy enclosure, tunnels, elevators, Steeles Avenue pedestrian connection and customer amenities.
• Agincourt Station: new second track, new and relocated platforms with canopy enclosure, tunnels, elevators, customer waiting areas, building relocation and customer amenities provisions.
• Unionville Station: new second track and turning track, new and relocated platforms with canopy enclosure, tunnels, elevators, parking expansion and customer amenities.

The project aims to reduce greenhouse gas emissions by reducing traffic congestion and fuel consumption. In addition to this, the design and construction of the project will generate employment opportunities and improve the quality of life of commuters by reducing their daily travel time.