Rehabilitation projects often require more extensive design investigations, utilising pavement analysis and design software (such as Rubicon) whilst drawing on experience-gained knowledge. Construction work on rehabilitation projects are also more extensive in order to restore functional and structural defects such as riding quality and a severely deteriorated pavement structures, with the addition of a thin surfacing to address surfacing defects such as skid resistance and waterproofing. Reseal projects are typically the addition of only a thin surfacing layer without increasing the pavement bearing capacity.