this post was submitted on 21 Nov 2024
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The traffic data is not as good as it appears. It is completely closed, only given to police and goverment agencies. No API, no numerical values for speed (only 5 'color codes' that are relative to location, so are almost useles) and numerical data is not given even to academics. I spent almost a whole month trying to get actual useful data for academic purposes, but Google really went out in their path to make it impossible.
It has the potential to be an excellent tool: crowsourced real-time data, access to historical data and it is incredibly fine-grained, improving over goverment data (at least in my city) by a 10 or 100x factor. But no, it had to be yet another Google's tool for spying on people, not giving it away and sell it to police.
I worked for a company contracted by government agencies (city/county/state/fed) to gather traffic statistics. We were used because they were not able to use Google traffic data as a blanket rule.
But for ordinary drivers, it's great.