Hailo allegedly did a piece of research to try and prove that black cabs were better than a private hire vehicle using Google Maps as Hailo had both at the time and had the data to compare.

The point of this was to enable a marketing campaign to sell Hailo for hailing black cabs because bus lane access and the knowledge meant that black cabs would be faster, etc.

But in reality, all they discovered was that for 99% of the time Google Maps was as good as, if not better than, the black cab.

Only in certain parts of London, at the worst of a rush hour or around some sporting event that has fouled up an area... does the black cab come out better by a small fraction, for a short window of time.

Google Maps is for all intents and purposes on par with a black cab and the knowledge.