Variable message signs (VMS) can be used. The use of VMS and their location must be agreed with the highway authority. Any wording and text colour must be in accordance with the TSRGD (TSR (NI) in Northern Ireland), and must not be scrolling or paging. Depending on their location, these signs may require temporary signing, lighting and guarding. Messages displayed on a temporary VMS must not conflict with any other signing – you may need to cover existing road signs and repeater signs (with the permission of the highway authority).
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