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Route 3 isn't completely fixed yet. I was driving north from I-95 on route 3 toward NH this week. At the top of the navigation window where it tells you what exit to take is correct with the new numbers, but there were little balloons on the map itself showing the old numbers.
I filed a Tesla bug report on one of these a few weeks ago, but I don't know if that's even the appropriate way to do it. Doesn't Tesla use Google data for their maps? Should this issue be taken up with Tesla, Google, or somebody else?