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Making the Invisible - Visible

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Pavement Investigations

Making The Invisible - Visible

Our PaveScoutTM and SparasTM systems are designed to operated at speeds of up to 100km/h, this allows massive areas to be surveyed and assessed in a short space of time. Significant benefits can include the removal of costly traffic management to access busy and critical road corridors or the rapid capture of time sensitive locations such as major airport runways.

The data can then be used to support dilapidation, asset management, wide-area network analysis or targeted maintenance projects across the pavement and infrastructure disciplines.

Pavement and Structures Investigations

Earth Radar’s technologies are truly world leading solutions to capture data and information related to pavements and structures at unprecedented accuracy while being captured at previously unimaginable speed.

The Challenge:

To achieve detailed and accurate measurement of surface and subsurface conditions throughout the road network to enable effective asset management.

The Solution:

PaveScout™ & Sparas™ employ a suite of world-leading technologies for highly-detailed measurement of surface and subsurface features of road and airport pavements. These systems can also be used to detect voids or other subsurface defects on approach to bridges, culverts and other structures or within bridge decks.



Surface characteristics

  • Surface Imagery - continuous high-definition illuminated imagery of road surface conditions
  • Surface gradient maps - detect minute bumps and surface defects using photometric stereo
  • Environmental cameras - identify roadside assets and record the surrounding environment
  • Rutting - straight edge, sliding straight or taut wire assessments
  • Roughness - International Roughness Index (IRI), NAASRA, IRI3, Boeing (airports) 
  • Texture - Sensor measured texture depth (SMTD), mean profile depth (MPD)
  • Cracking - Crack properties (length, width, type) and statistics along a road or throughout a network
  • Location and Visualisation - linear plots, geospatial views or digital terrain models from the collected data

Earth Radar ute underground locator device 8


Subsurface characteristics (3-D GPR)

  • Relate pavement layer depth and defect information to aid pavement modelling and interpretation of deflection measurements during pavement structural analysis
  • Detect and locate the extent of voids, moisture ingress or developing defects
  • Segment the road and determine extents of homogeneous pavement construction
  • Determine optimum coring / trench locations to maximise benefit of these investigations and verify the extent of their validity

Subsurface characteristics

  • Surface Imagery - continuous high-definition imagery of road surface conditions
  • Environmental cameras - identify roadside assets and record the surrounding environment
  • Location and Visualisation - linear views of the collected data or geospatial views using GPS positioning information

Combined surface and subsurface views

  • Improved forensic investigations - Directly compare surface defects and subsurface changes (e.g. defects; changes of construction) to enable better informed assessment of the causes of surface defects and selection of remedial treatments
  • Geospatial data displays - Compare location of surface and subsurface to better understand the results in context of the surrounding environment

Earth Radar Operators and Van on site 1

Further reading

Muller W., A comparison of TSD, FWD and GPR field measurements, International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE 2015), 15 – 17 September 2015, Berlin

Muller W. & Reeves B., Comparing traffic speed deflectometer and noise-modulated ground penetrating radar data for rapid road pavement investigations, 14th International Conference on Ground Penetrating Radar (GPR-2012), 4-8 June 2012, Shanghai, pp. 502-509, IEEE.

Muller W., A network level road investigation trial using Australian-made 3D Ground Penetrating Radar (GPR) technology, 25th Annual ARRB Conference, Perth, 2012.

Muller, W., Gucunski, N. & Reeves, B. An initial trial of a 3-D Ground Penetrating Radar designed for pavements applied to concrete bridge decks. 97th Annual Meeting of the Transportation Research Board, Washington DC USA, 7–11 January 2018.

Contact Earth Radar today to arrange a personalised obligation-free quote.


Headquarters – 

70 Darlington Drive, Yatala QLD 4207


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Making the Invisible - Visible

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