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8,357,138 ESALs as of 2300 hours on August 9, 2007 (84% of the 10,000,000 ESAL goal !).

RUTTING is being measured weekly with scanning lasers that are correlated to periodic dipstick profiles.  The average rut depth on 8/11/08 was 5.8 mm.

ROUGHNESS (via inertial profiler) within the middle 150 ft (research) portion of each section most recently averaged 92 inches per mile.

CONTACT this project via...

NCAT_Pavement_Test_Track 1600_Lee_Road_151    Opelika,_AL_36804_USA 334.844.6228            

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GOD BLESS AMERICA !

Performance data for each section will be viewed by positioning your mouse over the section in question and left-clicking.  This page is under construction, and currently you may only be able to see construction data. 

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Every Monday, trucking is suspended so that vehicle maintenance can be performed and pavement performance can be quantified.  An inertial profiler equipped with a full lane width dual scanning laser "rutbar" is run weekly around the entire Track in order to determine individual wheelpath roughness, right wheelpath macrotexture and individual wheelpath rutting for every experimental section.  Additionally, 3 random locations were selected within each section in a stratified manner to serve as the fixed test location for nondestructive wheelpath densities.  Transverse profiles are measured along these same locations each week so that rutting may be calculated using a contact method.  Every month, wet ribbed surface friction testing, falling weight deflectometer testing, and structural high speed response data is collected, along with videologging to provide a permanent visual record of surface performance.  Every quarter, cores are cut from the wheelpath of every section so that densification of each layer can be considered.
To facilitate lab to field performance correlations, numerous test specimens were compacted using actual plant run material at the time test sections were constructed.   Additionally, hundreds of pounds of loose mix were sampled and saved during production of each experimental section to facilitate other research projects that can be enhanced by being plugged into Track research.
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Last updated: July 28, 2008.