A new link into the Olympic Park underneath the busy A12 dual carriageway has been finished on schedule.

The underpass was constructed beneath the busy six-lane dual carriageway, while it remained fully operational to daily traffic.

Fifty workers were involved in the installation of the underpass, which was completed in just 28 days.

Olympic Delivery Authority Chairman John Armitt said: "The delivery of this critical engineering project on time is a significant achievement given the complexities and challenges involved. It is a testament to the hard work and ingenuity of our workers and engineers working round the clock to construct the new underpass beneath a busy dual carriageway, without causing any disruption to motorists."

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The new underpass was created by pushing a pre-built concrete box through the ground into position.

The ground ahead of the box was excavated while a series of hydraulic rams pushed the box into the tunnel face.

The concrete box was constructed in three sections and weighs 3,500 tonnes.

(CD/GK)