Surface Characteristics
In addition to structural performance, MnDOT also monitors various pavement surface characteristics. These include ride (lightweight surface analyzer), texture (sand patch, circular texture meter), friction (locked-wheel skid tester, dynamic friction tester, grip tester), noise (on board sound intensity, sound absorption), and permeability (permeameter). Researchers aim to optimize all of these surface characteristics while providing a safe, smooth ride for the driving public.
Pavement Management Vans
A Digital Inspection Vehicle (DIV) is driven to  |
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Circular Texture Meter
The Circular Texture Meter quantifies pavement surface texture for both asphalt and concrete.  |
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Sand Patch
The sand patch test method is suitable for field tests to determine the average macrotexture depth of a
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Locked-Wheel Skid Tester
 MnROAD uses a Locked-Wheel Skid Tester over different pavements withe application of water to produce and record lower friction values.
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OBSI
 On Board Sound Intensity (OBSI) captures the tire pavement interaction noise using a set of sophisticated microphones mounted near the contact patch.
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Sound Absorption
 The sound absorption test measures the sound absorptiveness of pavement.
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LISA
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