We employed several different surveying methods to deliver the data.
We first used a mobile mapping approach to capture levels of all highway features, including drainage, carriageway levels, road markings, VRS, and kerb lines. We surveyed the approaching 100m area to each structure, as well as 100m past the structure, in both carriageway directions, to assist with future carriageway design.
The structures and highways were surveyed using a vehicle-mounted laser scanner, eliminating the need for Traffic Management.
Then, a static Laser Scan Survey was then carried out under Traffic Management using an IPV and Lane 1 / Hardshoulder lane closures.
The Laser Scan Survey consisted of headroom measurements being captured at each lane demarcation; rib lines, lane dividers and more, as well as the boundary between the hard shoulder and any kerb lines, VRS or soft verge.
Two control stations were installed at each bridge, with various scans taken approximately 25m distance from the structure on either side to create a Point Cloud of the whole structure.
Road markings were also surveyed from each set up using a total station to provide ground control for the Mobile Mapping element.