Great move by those Brazilian bus companies but I just want clear something, Is this only applicable in travel booking? If so then it would be much better if they'll also add a system where they can do the transaction already inside the bus, I'm sure that the busy bee ones who don't have time for booking will be benefited by this. Though my suggestion seems hard to achieve but if they will succed then their country will be benefited a lot.
Dont think its feasible to implement this system inside the bus. This requires internet connection on every bus which is not always available in Brazil. Even if you manage to solve that, youll basically need almost instant confirmations - even 30 second confirmation time might result in large delays.
I get the desire of people to see bitcoin (or crypto in general) implemented in more areas. I too wish there were more options to use bitcoin, but there are cases where there is simply no point to do so. Dont take it personally, its just that I see this kind of posts a lot lately. Bitcoin is great and has the potential to make our life better in many aspects. This doesnt mean that its always the best option.