Local Road Management Manual 357 – e.g., chalk) Raters should purchase or manufacture all equipment. No supplies will be available from Central Oiffce. Dimensioned drawings to assist in making the straight edge, measuring wedge and crack width scale are shown in section 5. During the survey, some items in the rating segment are examined in detail at representative two lane 50 m gauging lengths. On these occasions or when the vehicle is stopped for quick inspections, the rating vehicle should be moved to the side so that wherever possible, there is no obstruction to traiffc. Safety equipment for traiffc guidance should include: Safety vests for personnel Traiffc guidance cones Appropriate Advance Warning Signs Note: A traiffc controller may be required in some sections where there is diiffcult alignment or high traiffc volumes Note: Representative 50 Meter Gauging Length On a rural road, a two-lane 50-meter gauging length is selected to rate the lfexible item ‘Rutting’. All other items are assessed over the segment’s total carriageway area.