NEWS

New Irish Motorway Mapped Using Lasers

Geospatial engineering company Coastway has completed an as-built survey of the final section of the M8 motorway in Ireland. The Streetmapper equipment was used to collect billions of highly accurate measurements in a fraction of the time it would take using traditional survey techniques the resulting 3D models will be compared to the digital design and will be used as a base line record against which future surveys can be compared.

Opened on the 28th May 2010 the 41 kilometre M7 to Castletown & M8 Portlaoise to Cullahill section was the last to open and completes the to interurban route.

Using StreetMapper and working on behalf of the Portlaoise Joint Venture, Coastway mobile mapped both carriageways on each side of the newly constructed motorway, including slip , recording as built road levels, utilities and structures. A combination of the StreetMapper data and GPS was used to create a 3D model of the road surface from which cross sections were generated at intervals of 10 metres for comparison with the design at the corresponding chainage. Additional control points along the route were used to tie the StreetMapper data to the site grid contributing to an absolute vertical accuracy of better than 10 millimetres.

The resulting models can also be used as a base line against which subsequent surveys can be compared to check for deformation or deterioration of the road surface, asset management, redesign, bridge clearance, route planning and road marking and signage.

https://www.gim-international.com/content/news/new-irish-motorway-mapped-using-lasers