You can look at small parts of it there. And sometimes you can't even buy what you're looking at, GMaps API won't hand out public transport trips in some countries. And where you can, it's fairly expensive. (No idea about traffic or people movement data.)
Restricted access to the data makes it hard for you to do it.
But that’s a you problem.
Not only that, it also means that some other researcher can't do it either, and I can't get free access to the results.
In any case, do you have some helpful comments too, maybe?