Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/136

MOBILE LANE CLOSURE TECHNIQUE

Three vehicle or trailer-mounted signs are required on the hard shoulder and three block vehicles are positioned on the carriageway:

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 * three vehicle or trailer-mounted signs to diagram 7402 showing supplementary plate "800 yds", "500 yds" and "200 yds" positioned at intervals of 250 m to 300 m in advance of the initial block vehicle B3;
 * one block vehicle B3 carrying a light arrow sign (or sign to diagram 7403) in lane 3, 50 m – 100 m in advance of next block vehicle B2;
 * one block vehicle B2 carrying a light arrow sign (or sign to diagram 7403) straddling the lane line between lanes 2 and 3, 50 m – 100 m in advance of block vehicle B1; and
 * one block vehicle B1 carrying a light arrow sign (or sign to diagram 7403) in lane 2, 50 m – 100 m behind the working vehicle A carrying sign to diagram 7403, see Plan MLC4 for the position of the lane 2 block vehicles where works are being carried out on foot.