O2.5.3 Electronic light-emitting roadside variable message signs (VMS): The use of these, if present, to warn of mobile lane closure operations, and the establishment and removal operations associated with static temporary traffic management arrangements should be considered. Where queue detection systems (e.g. MIDAS) are installed within the area of the works, consideration should be given to disabling the system for the duration of the traffic management operations concerned. Reference should be made to the codes of practice: "The Joint ACPO and HA Policy and Procedures for the Use of Variable Message Signs (VMS) by the Police and Regional Control Centres" (Highways Agency/ACPO, 2005) and "The Joint ACPO and HA Policy and Procedures for the Police Use of Matrix Signals" (Highways Agency/ACPO, 2002), or equivalent documents. The codes of practice referred to are those related to roads in England. For details of the appropriate rules that apply in Scotland, Wales and Northern Ireland refer to the appropriate regional government.
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