Traffic Signs Regulations and General Directions
| Traffic Signs Regulations and General Directions ： ウィキペディア英語版|
The Traffic Signs Regulations and General Directions (commonly abbreviated to TSRGD) is the law that sets out the design and conditions of use of official traffic signs that can be lawfully placed on or near roads in England, Scotland, Wales, and the Isle of Man.
The TSRGD has undergone several major re-issues and each of these has been amended for minor changes many times before the present series was first published in 1965. (Issues before that covered a former traffic signs system dating back to the early twentieth century which has now been superseded – see TSRGD 1964, below.) The amendments usually just introduce one or two new types of sign or a minor change to an existing one. It's worth noting that innovative signs that are not yet authorised by the TSRGD often start to appear on the roads years before they get TSRGD approval, but until they do, the local authority wishing to use the sign must have it individually approved by the Secretary of State for Transport.
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