In past times a Marshall Survey represented the usual method for preparing
an inventory of the condition of sections of highway. It involved groups of technical staff compiling information throughout their area on the condition of
carriageways, kerbs, etc. Nowadays, the information can be collated using the
computer program CHART (Computerised Highway Assessment of Ratings
and Treatments), a management system for assisting maintenance engineers. It
provides information on the lengths of highway that are substandard, the treatments required and the relative priorities for treatment