A computerised system such as CHART has not yet been developed for rigid
pavements. Nonetheless, the aim of the procedure in this instance must be to
accurately record all relevant features observed, be that the condition of the carriageway itself or related matters such as drainage or earthworks problems.
HD 29/94 (DoT, 1994a) provides guidance on how the information from
visual surveys should be interpreted. A summary of these interpretations is given
in Tables 9.1 and 9.2