Mexico (at least up north where I e been) has little neighborhoods like in the US, but they all have their own stores and stuff. Like a mini suburb in a subdivision.
31 mph would be plenty.
They also have a robust "microbus" economy. These are basically private individuals running little routes in the neighborhood and between them, to some of the bigger shops.
This vehicle could be well suited for this and the micros are as ancient as they are ubiquitous. It's a good little chunk of traffic. Of that's what they're targeting, then it strikes me as clever. Bunch of folks mostly running errands.
It'll be neat to see how it does.