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Traffic Sign Recognition is a technology by which a vehicle is able to recognise the traffic signs put on the road e.g. "speed limit" or "children" or "turn ahead". This is part of the features collectively called ADAS. The technology is being developed by many automotive suppliers, including Continental and Delphi.
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History
These first TSR systems which recognize speed limits were developed in cooperation by Mobileye and Continental AG. They first appeared in late 2008 on the redesigned BMW 7-Series, and the following year on the Mercedes-Benz S-Class. Currently these systems only detect the round speed limit signs found all across Europe (e.g.).
Second generation systems can also detect overtaking restrictions. It was introduced in 2008 in the Opel Insignia, later followed by the Opel Astra and the Saab 9-5. This technology is also available on the 2011 Volkswagen Phaeton and since 2012 in Volvo S80, V70, XC70, XC60, S60, V60 and V40 (model year 2013-), as a technology called Road Sign Information. They are not able to recognise city limit signs, which in most european countries have meaning for speed limits, as they are too equal to direction signs.