The ambitious Crossrail project has reached the half-way stage, with Prime Minister David Cameron marking the event, nce.co.uk reports.
Crossrail has confirmed that the £14.8 billion cross-London rail network initiative is half complete. Between the 10,000 employees working on the project, some 30km of tunnels have been constructed in addition to ten new stations.
Many of the workers - including 280 apprentices - celebrated both above and below ground, while Mr Cameron along with the Mayor of London and Transport Minister inspected the tunnels beneath Tottenham Court Road.
Not only has the project created thousands of engineering jobs - a total of 55,000 in all, said the prime minister - but the scheme will also help the capital cope with the rising demands placed on the existent transport system, which is vital for the British economy.
The population of London is expected to reach 10 million people in the next two decades and Crossrail will apparently increase the rail network's capacity by an extra 10 per cent, says telegraph.co.uk.
Speaking at the half-way celebration, Boris Johnson told onlookers: "There was a time when some said that building a huge tunnel deep below the streets of London was a mad plan that would do nothing for our economy. But as this awe-inspiring project hits its halfway point - we can see how wrong the naysayers were.
"Crossrail will revolutionise east-west transit in the capital, making London an even more attractive place to visit and invest."
The project is due to open to the public in 2018.