7.1 Definitions

There are
four
 pavement design categories:
  • “new” pavement design
  • pavement reconstruction design
  • pavement rehabilitation design
  • pavement preservation
    .
It is very important that the designer conduct an early investigation to determine which category applies to the project.
The following table lists the definitions for each pavement design category.
Table 2-2: Pavement Design Category Definitions
Term
Definition
“new” pavement
A combination of a base and surface course placed on a subgrade to support the traffic load and distribute it to the roadbed for flexible pavements or a combination of a base and a PCC slab for rigid pavements.
pavement reconstruction
Construction of a new pavement structure, which usually involves complete removal and replacement of the existing pavement structure including new and/or recycled materials.
pavement rehabilitation
Resurfacing, restoration, and rehabilitation (3R) work undertaken to restore serviceability and to extend the service life of an existing facility. This may include partial recycling of the existing pavement, placement of additional surface materials, or other work necessary to return an existing pavement, including shoulders, to a condition of structural or functional adequacy.
pavement preservation
Pavement preservation extends highway service life and provides smoother, safer and more reliable roads. Preservation approach selects the most cost-effective action to address a specific condition and performance need, providing the optimal means of minimizing life-cycle costs.
NOTE: These definitions do not necessarily coincide with program definitions.