The data below shows the breakdown of Good, Fair, and Poor condition MP pavements since 1988. These values are determined by a combination of IRI, Traffic Volume, and Visual Inspections. Generally, pavement condition is closely tied to rideability. However, during recent years, the percentage of poor MP pavements has increased in spite of decreases in average roughness. This is likely due to an increase in surface distresses that do not impact rideability. Examples include centerline joint separation, raveling, and rutting.