The Severn Partnership and consulting engineers Parsons Brinckerhoff were selected to undertake a detailed survey of over 280 bridge and tunnels structures on the great Western main line (October 2009 to December 2009). This included the Severn Tunnel along with Box, Sodbury, Newport and Patchway Tunnels. All surveyed as 3D point clouds combined with high accuracy track geometry using our new GRP5000 system.
The Rail Engineer, March 2010 - Article on tunnel survey and kinematic laser scanning
