Pavement Conditions Survey identifying good, fair and poor pavements (visual).

Consistent and reliable survey results are important in order to decrease subjectivity and variability in the identification of distresses typically found within flexible and rigid pavements. They also provide a method of recording these observations in a consistent manner.

The designer/planner is interested in the type, extent, and severity of visible distress or corrective action taken on previous distress (such as number of patches or length of sealed cracks). Depending upon the type of distress. Occurrences are recorded in terms of percentage area or areas.

Coring is a useful tool for investigating structural condition in pavements. As well as providing important information about layer thickness, necessary for the correct interpretation of other surveys, cores provide an opportunity to examine the visual condition of the various materials within the pavement.

In order to reduce the number of cores, as they are costly and often difficult and dangerous to undertake, GPR should be considered for each project as a tool to identify appropriate core locations.

As coring can be costly and dangerous to undertake, a preliminary GPR survey should be considered for each project as a tool for identifying appropriate locations thus limiting core numbers, lane closures and limiting risk to the coring team.