Dont know if this has been shown before..( you might have to click on the link)
Note the large MSCP next to Parkway!!
Also there is an interesting article in the September edition of New Civil Engineer about the DART and the challenges in building it- sorry no link.
Coordinating seven separate sites at the same time.The viaduct section only being possible due to an agreement with the Newspaper site to use their land for access.
Problems associated with the tunnel under the taxiway and unknown cables, fears of shutting the Airport down if they cut through critical services.
Evidently the Gateway bridge weighs 1,000t and can only be raised into position with certain cranes due to the proximity of the 08 threshold if in use.