My question is
Where the hell did they get all these pictures of people on bikes and motorcycles
Like did someone just go to India for a week and take pictures of everyone riding a bike?
Kinda fuckin creepy tbh 
Discussion
Is that how you are supposed to do those man
I always just did the bicycle and always failed
They are sold via blocks of information from various companies. Think YouTube, Amazon, etc.
Public access traffic cams most likely.
Probably ring cameras too. Those, google devices, amazon etc map your neighborhoods through the wifi connections. I can't remember the specifics but it's pretty crazy.
I think it’s Google Street View and Self-Driving cars. That’s just a guess.
cameras everywhere with everyone agreeing to ToS that allows scraping their cloud stored data. they prolly have enough photos for millions of years of Captchas
A long time ago it was just house numbers. Then it was image subject recognition. Now it’s traffic stuff. They once used it to train street view address recognition. Then they needed image content identification confirmation for image archives and search. Now they’re training self driving vehicle traffic item recognition. We are artificial intelligence trainers on this shit. I own Tesla stock, so I do no less than 8 rounds of these, getting it convincingly wrong every time.