MULTI-SPEED DEFLECTOMETER
STRUCTURAL PAVEMENT SURVEYS AT TRAFFIC SPEEDS
A pavement network analyzed by MSD in Auckland (NZ), shown on the GeoSolve PaveState GIS
Multi-Speed Deflectometer
The Multi-Speed Deflectometer (MSD) is a traffic speed structural pavement survey device developed by GeoSolve for screening road networks. The MSD consists of one or two sensored tyres mounted on a short (2 to 3 axle) wheel base truck, enabling access to winding rural and constrained urban roads.
The MSD can also survey at any time of the year, particularly during the wetter winter-spring periods, when the pavement is in its most critical condition. Laser based structural survey solutions require fine weather for testing and therefore normal survey during the dryer summer months when weaker structural treatment length can be more difficult to locate.
Pavement inspection in a box
Using advanced manufacturing techniques such as 3D Selective Laser Sintering in titanium, our equipment is built to withstand the toughest of conditions.
While other pavement monitoring systems require large components and trailers, the MSD is built to be shipped in a small transport kit that you can wheel around in the back of your car. Together with bespoke tyres, designed and produced in Waihi - New Zealand, everything you need for proper network surveying can be made available within a moment’s notice.
PaveState monitoring software
To interpret the large amounts of data provided by the MSD system, our proprietary software PaveState has been tailored to show you the information in a comprehensive way. A team of pavement experts will help you understand the condition of your pavement, and will show you how to optimize your design.
By reviewing the MSD measurement results with other data sources, such as TSD, FWD, roughness, pavement images etc., PaveState is able to show stakeholders the condition of your roading network.
MSD Benefits
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Traffic speed surveys
Covers 95-98% of network
Identification of Structural Treatment Lengths
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Test on subgrade, subbase and final construction
1 m sampling
Determine variability and weak areas
Correlates with FWD and LWD
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Survey during or immediately after flooding to rapidly assessing the network condition and extent of damage
Identify critical routes
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Mining/Forestry
Monitor structural damage over time
Determine optimum routing.
Determine seasonal damage
Freeze/Thaw
Rapidly survey network to identify when to lift and impose loading restriction, to optimize vehicle and reduce structural damage
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No capital outlay
Easily installed and uninstalled on a standard truck hired locally
Addressing the stakeholders needs!
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Survey when the pavement is most susceptible, during the wetter autumn, winter and spring months
Provides a rapid assessment of the structural condition of the road network Identifies the weak areas.
Helps determine whether a structural or functional failure
Output remaining MESA
Focuses valuable and scares resources for project level investigation
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Quickly assess and show network condition via the PaveState GIS
Monitor trends over time
Repair at the optimal time
Use the structural information to produce a long term forward works program.
Import MSD data into RAMM, Junoviewer, HDM4 and ArchGIS
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Ensure budgets are used effectively
Stop being reactive and proactively manage pavements
Allow for longer term planning
MULTI-SPEED DEFLECTOMETER
7
COUNTRIES
45
NETWORKS
over 40,000
LANE KILOMETERS
CLIENTS
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The Multi-Speed Deflectometer: New technology developed for traffic speed non-destructive structural testing of pavements.
L. Grimshaw and G. Salt, Pavement Analytics Group, GeoSolve Ltd, New Zealand and A. Marradi, Department of Civil and Industrial Engineering. Università di Pisa.
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BEST PAPER AWARD
The Multi-Speed Deflectometer: New technology developed for traffic speed non-destructive structural testing of pavements.
L. Grimshaw and G. Salt, Pavement Analytics Group, GeoSolve Ltd, New Zealand and A. Marradi, Department of Civil and Industrial Engineering. Università di Pisa.
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Pavement Structural Performance: Predicting Remaining Life Using Rapid Non-Destructive Testing.
G. Salt & L. Grimshaw, Pavement Analytics Group, GeoSolve Ltd, New Zealand and A. Marradi, Department of Civil and Industrial Engineering. Università di Pisa.
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Optimising Treatment Lengths, Closely Spaced Pavement Strength Data
Lily Grimshaw, Pavements and Geotechnical Engineer at Geosolve Ltd
