Area 9 commissioned RouteMapper to provide combined imagery and LiDAR data for sections on the M6 and A500. The requirement was to look at possible issues with standing water on short sections of these roads.
Amey on behalf of the Highways Agency commissioned IBI Group to carry out a number of scheme based surveys within Managing Agent Contractor (MAC) Area 9. Area 9 covers the motorways and trunk roads in eight counties and three metropolitan boroughs, plus Birmingham in the West Midlands.
The aim of these surveys was to establish possible issues arising from standing water on the carriageway after heavy rainfall on a number of selected routes along the M6 and A500 corridors.
To carry out such detailed surveys by traditional methods would have been very costly and time consuming, involving a great deal of traffic management and site staff physically taking spot heights at regular intervals from the carriageway.
IBI Group employed its industry recognised RouteMapper system, comprising dual LiDAR scanners and on-board navigation systems. All LiDAR data was collected during the night, at traffic speed, removing the risk to site staff and the requirement for any traffic management.
The resultant 3D geo-referenced dataset was employed to produce longitudinal profiles for the Nearside and Offside wheel paths and Centreline for all running lanes, highlighting change in gradient and also contour plans in both conventional form and colourised raster images. This graphical representation greatly assisting in the visual identification of potential areas of standing water.
IBI Group’s application of LiDAR processing in a creative manner allowed Amey and the Highways Agency to identify areas of carriageway for targeted maintenance intervention, to a level beyond which could have been supplied by conventional means.
Amey now consider the use of digital imagery and LiDAR as best practice within the group for such applications as these offer considerable savings and decreased road user delay.