Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/132

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:
 * three vehicle or trailer-mounted signs to diagram 7402 showing supplementary plate "800 yds", "500 yds" and "200 yds" spaced at intervals of 250 m to 300 m starting 200 m to 250 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 1, 50 m – 100 m in advance of the next block vehicle;
 * one block vehicle B2 carrying a light arrow sign (or sign to diagram 7403) straddling lane line between lanes 1 and 2, 50 m – 100 m in advance of block vehicle B3; and
 * one block vehicle B1 carrying a light arrow sign (or sign to diagram 7403) in lane 2, 50 m – 100 m in advance of the working vehicle A carrying sign to diagram 7403. See Plan MLC4 for the position of lane 2 block vehicles where works are being carried out on foot.

NOTE: Where two-lane closures are to be carried out, if the works allow a choice of closing lanes 1 and 2 or 2 and 3 then the latter option should be chosen since it does not require slower moving traffic to change lanes; see Plan MLC5. 130