Initial service life equations show that asphalt pavement are not only performing according to design life, which is normally 20 years, but can be maintained longer with routine maintenance (like use Crack Sealing Machine), which may include crack sealing, surface treatments, milling and overlays of nominal aggregate size.
Maintenance is not normally thought to add structural value to the pavement, but merely to restore surface for rideability, safety and environmental protection from the elements.
The loss of serviceability, or a decrease in present condition rating, can be the result of both traffic and environmental factors. Appropriate and timely maintenance, which may include Crack Sealing, cross-slope, shoulder and general drainage improvements in conjunction with some surface restoration, can retard environmental effects on the loss of common road pavement.
