The equivalency factors as given by the AASHTO Pavement Design Guide are presented
here for flexible pavements in Tables 3.1 through 3.9, and for rigid pavements
in Tables 3.10 through 3.18. For each pavement type, the tables are arranged by axle
configuration and terminal serviceability pt
. Factors are included for single-axle,
tandem-axle, and triple-axle configurations, and for pt values of 2.0, 2.5, and 3.0. In
the tables for flexible pavements, the pavement strength is characterized by a pavement
structural number (SN), which is defined in Art. 3.7. The use of the tables is illustrated
by the following example.