This was done by pulling the northern approach viaduct 700 millimetres southwards.

Engineers have joined the Queensferry Crossing's north deck and viaduct meaning the bridge is now connected to Fife.

Massive because the viaduct is 222 metres long, weighs approximately 6,000 tonnes and had to be pulled up a gradient of about 3 .

Despite the massive size and weight of the bridge completing the closure between the viaduct and bridge deck is a delicate operation involving extremely precise tolerances for fit up.

And to do that meant creating the flattest gradients that had ever yet been made, which meant building long viaducts across river valleys this is actually the viaduct across the Thames at Maidenhead and long tunnels such as the one at Box, in Wiltshire.

According to related specifications, there are two open excavation sections set at both the south and north ends of Yuhan Tunnel for the southern extension section of Shunhe Viaduct, and time staggered construction measures are taken for the both open excavation sections to reduce the impact on the traffic, which will be open to traffic in succession.