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11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).
Cars are beginning to feature cameras with automatic traffic sign recognition, beginning 2008 with the Opel Insignia. It mainly recognizes speed limits and no-overtaking areas. [10] It also uses GPS and a database over speed limits, which is useful in the many countries which signpost city speed limits with a city name sign, not a speed limit sign.
Traffic-sign recognition first appeared, in the form of speed limit sign recognition, in 2008 for the 2009 Vauxhall Insignia. [1] Later in 2009 they appeared on the new BMW 7 Series, and the following year on the Mercedes-Benz S-Class. At that time, these systems only detected the round speed limit signs found all across Europe (e.g. [2]).
Street name sign or street sign A traffic sign designed to notify road users what the name of the street is. Street running or on-street running The routing of a railroad track or tramway track running directly along public streets, without any grade separation. Stroad A type of thoroughfare that is a mix between a street and a road. [12] [13]
Before 1987, most road signs had black backgrounds – diamonds indicated warnings, and rectangles indicated regulatory actions (with the exception of the Give Way sign (an inverted trapezium), and Stop sign and speed limit signs (which were the same as today)).
Question: Something that has not made sense to me since I started driving (49 years ago) is the apparent discrepancy in the posted speed limit (for example 50 mph) and the cautionary speed signs ...
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