Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/146

 Traffic signal maintenance is dealt with in Section D3.25.

Plan SC12: Road works at a crossroads junction with traffic signals

The approach to the obstruction should be signed, coned and warning lights provided as usual. The "end of road works" sign to diagrams 7001 and 645 should not be provided in this case. See Plan SC13, Case A.

Two-way traffic past the obstruction should be maintained if possible. If not, entering traffic should be prohibited and a diversion route arranged. In this case, part of the circulatory area should be coned-off as shown, to restrict traffic to one lane going towards this exit and advance warning of road narrows to diagram 517 should be provided. If no suitable diversion routes are available, it may be necessary to adopt alternating one-way working.

All movements should be maintained if possible. The obstruction should be coned, and warning lights placed and a "road narrows" sign to diagram 517 provided. See Plan SC13, Case B.

The obstruction should be coned and warning lights placed. See Plan SC13, Case C. If suitable roads are available, diversion routes should be provided. TSRGD (direction 53) require that the traffic authority’s written permission is obtained. The use of portable traffic signals is dealt with in Section D5.10. 145