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Many GPS show the current speed limit (I live in France) and it's pretty accurate. They know when we're next to schools, when there's no explicit sign, when a p
by tajen 11y ago
Many GPS show the current speed limit (I live in France) and it's pretty accurate. They know when we're next to schools, when there's no explicit sign, when a particular city changed the default speed limit, etc. Who would have imagined 10 years ago that Google Maps photographed all houses? The same happened with speed limits.
- Robadob 11y agoThe fact that some Sat Nav companies like Tom Tom have so many devices in use, they are able to report traffic in real-time.[1] It wouldn't surprise me if similar averages over a longer period are used to identify speed limits (e.g. What is the mode speed rounded to a multiple of 10, when speeds do not appear constrained by traffic). [1] https://www.tomtom.com/en_gb/licensing/products/traffic/real-time-traffic/hd-traffic/ https://www.tomtom.com/en_gb/licensing/products/traffic/real...