This SAE Standard incorporates driving cycles that produce fuel consumption data relating to Urban@ Suburban@ and Interstate driving patterns and is intended to be used to determine the relative fuel economy among vehicles and driving patterns under warmed-up conditions on test tracks@ suitable roads@ or chassis dynamometers. Purpose This document provides uniform testing procedures for measuring the fuel economy of light-duty vehicles (motor vehicles designed primarily for transportation of persons or property and rated at 4500 kg (10 000 lb) or less) on suitable roads.