Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/142

 obtained by the Highway Authority, for example, by using a "no right turn" sign to diagram 612 from the major road into the side road affected. If convenient roads are available, temporary diversions should be arranged and signed, see Section D3.15.

The area occupied by the works should be coned-off and the usual advance warning signs should be provided on all approaches — see Plans SC9 and SC10.

If the road width available to traffic has to be reduced to less than 5.5m, (see paragraph D5.14) it will be necessary to control traffic by means of "STOP/GO” signs or portable traffic signals as described in Sections D5.8 and D5.10.

On the main road, "road works" signs to diagram 7001 with distance and direction to hazard plates to diagram 573, pointing in the appropriate direction, should be used to warn drivers turning into the side road that they will encounter road works. If any turns are prohibited temporarily under an order, the appropriate "no right/left turn" signs to diagrams 612 or 613 should be provided. The "road works to left/right" signs to diagrams 7001 and 573 will not then be required. See Plan SC10.

If the width of road available in the side road is sufficient for one-way traffic only, all turns from the major road must be prohibited, after an order has been obtained, so that the side road operates one-way only past the obstruction. A similar effect could be achieved by using the "no entry" sign to diagram 616, again after an order has been obtained. A diversion should then be signed to permit access to the side road, see Section D3.15. If side road traffic is very light and there is little risk of traffic on the main road being inconvenienced, it may be possible to operate alternate one-way working past the obstruction in the side road, but this must be treated with extreme caution.

Where the junction is normally controlled by "GIVE WAY" signs and the designer decides that the level of traffic or visibility problems require the minor road or access to be controlled by signals, both the junction and the shuttle lane should be controlled by a multiphase portable signal controller and the "GIVE WAY" signs and markings should be temporarily masked or removed. Any cable crossing protectors used should be sited away from turning traffic and where braking and acceleration are unlikely to occur.

Plans SC9 and SC10 show indicative locations for prohibition and warning signs in order to ban or advise of road works ahead. These signs are additional to the standard road works signing. 141