With the first Elizabeth Line train entering passenger service between Liverpool Street and Shenfield last month, the capital has already got a glimpse of how Crossrail is shaping up.
And now a new batch of pictures has been released revealing just how much work is going into developing the £14.8bn infrastructure project.
Full steam ahead: Crossrail is officially coming to Heathrow Terminal 5
A team of engineers is working to fit out the Elizabeth Line tunnels to enable services to commence from December next year.
Over 1,500km of cable is being used to supply power, lighting, and ventilation systems to the new railway. Each Elizabeth Line train will draw power in the tunnels from the rigid overhead catenary system's aluminium alloy conductor bar which holds copper contact wire. These bars are being installed at present, in 10 metre sections.
Powering the £14.8bn Crossrail project:
The Elizabeth Line route will pass through 40 stations from Reading and Heathrow in the west, through twin-bore tunnels to Shenfield and Abbey Wood in the east.
The first train entered passenger service eight years after construction started. This will be followed by the Transport for London (TfL) Rail Service opening between Paddington and Heathrow Terminal 4 in May next year.
The Elizabeth Line through service will then extend from Shenfield to Paddington by May 2019 and the line is expected to be fully open in December 2019, extending to Reading and Heathrow Terminal 4.
The first Elizabeth Line train in action: