Performance is defined by key distress types and smoothness and is directly related to the future maintenance, rehabilitation, and user costs of the highway. An upgraded PaveSpec 3.0 is now available. For those who have obtained a copy of the manual and used it, it has served that purpose well.
All materials expand and contract to some extent as their temperatures rise or fall.
There are also, however, examples of concrete pavements that have had unexpectedly poor performance. In these latter instances, usually one or more aspects of the materials and mix design, the environment, the pavement design and the construction process were not sufficiently considered for the requirements placed on the concrete. The following are FHWA research reports. If you are interested in obtaining a hard copy of one of these reports, please contact the FHWA Report Center.