Flexible Pavement Performance in relation to In Situ Mechanistic and Volumetric Properties Using LTPP Data

Table 3

Rut life as a function of air voids sorted by base type.

Base type	State ID	No. of points	Transformation function	𝑅^2 value
GB	NC, TX, SC, GA, CA, PE, MO, MA, CT, MT, ID, NV, AK, CO, and NM	32	Exponential	0.07
GS	SC, MS, GA, AR, MD, NJ, HI, TN, and PQ	19	Exponential	0.54
TB	CO, WA, PQ, NM, OK, TX, MS, GA, CA, DE, AR, and MD,; NJ, TN, WY, CA, ME, and MN	39	Exponential	0.02