They show up when users in navigation mode are travelling slower-then-usual. Green means the traffic is normal but orange and red indicate slow-downs. You may have seen streets coloured green, orange or red.
Google Maps continuously refreshes based on anonymously-tracked user data, traffic sensors and satellite data to ensure the most accurate traffic conditions are being displayed. If the stunt pulled off by Weckert is able to fool Google Maps’ system, can you always be certain about the app’s accuracy? From what we know about the app’s algorithm and Google’s responses to Weckert’s stunt, the answer is apparently: yes, mostly. Though it’s a clever trick, it raises important questions about how Google Maps keeps track of the data it collects in ordinary traffic conditions. He practically deceived Google Maps into thinking there was an actual traffic jam, when in fact there was none. Recently, Berlin artist Simon Weckert ‘ hacked‘ Google Maps by dragging a cart full of 99 iPhones running the app around the city.
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