Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/101

 In order to determine the appropriate method of working, single and dual carriageway roads are split into categories depending on the daily vehicle flow per carriageway. The road categories are:
 * Category 1: >80,000 vehicles/day
 * Category 2: 20,000 to 80,000 vehicles/day
 * Category 3: less than 20,000 vehicles/day

For each road category the choice of vehicle used should be determined based on a site specific risk assessment. Section O5 deals with vehicle issues and the specification of temporary traffic management vehicles is given in Section O5.5.

For Category 1 and 2 roads, the following method should be followed by the operative:
 * drive at a minimum of 30 mph on the nearside lane of the carriageway; and
 * pull up on the hard shoulder or at a safe location to record or assess defects.

On a dual carriageway with a hard shoulder, the inspection should be undertaken from the hard shoulder if this is practicable and safe to do so.

For Category 3 roads, the following method should be followed by the operative:
 * when travelling slowly, allow traffic to pass at a suitable safe location;
 * use a roof-mounted beacon during the inspection and hazard warning lights when stationary;
 * place a diagram 7404 “HIGHWAY MAINTENANCE” sign to the rear of the vehicle during the inspection; and
 * park at a safe location and walk back to mark the defect, facing oncoming traffic.

Walk and inspect method: 99
 * for Category 1 & 2 roads use a static lane closure (see Part 1: Design, Sections D5 and D6), or, on dual carriageway roads only, a Mobile Lane Closure (see Section O10, Plan MLC4) or the Mobile Carriageway Closure technique (see Section O11.1);
 * for Category 3 roads, carry out the work from a footway or verge off the road or face oncoming traffic, otherwise a static closure is to be used; see Part 1: Design, Sections D5 and D6.