In regards to data accuracy: The GPS isn't off, otherwise the track wouldn't be following the US101 so nicely.
And it is indeed not fact or probative value, but it's by a long shot the best data available.
I'd see it as more reliable than an eye witness.
The data also fits exceptionally well with the crash location, so there aren't any red flags in regards to the data that would make them unbelievable.
