Unidriveways are technically illegal in Calgary but I'm not sure how stringent enforcement is. People skirt the issue by doing crap like this:
https://www.google.com/maps/@50.8880...7i13312!8i6656
At least the gravel is permeable and won't instantly overload the storm sewers nearby. That's the other issue with unidriveways.
Then there is ugly shit like this:
https://www.google.com/maps/@50.8884...7i13312!8i6656
A couple of pieces of astro turf as 'greenery'. The rest is all gravel.
Gravel has also replaced side lawns that front onto the street for 'low maintenance':
https://www.google.com/maps/@50.8884...7i13312!8i6656
Here's a craptacular example of the lack of yard in a cul de sac of a new community. The unidriveway is simply an honest expression of the poor planning that went into building the community. The city of Calgary had good intentions to reduce urban sprawl by reducing lot sizes in new communities. The unfortunate reality is crap like this as there is virtually no yard space.
https://www.google.com/maps/@50.8892...7i13312!8i6656