In last version updated (early March 2021) is not really precise. I often got your direction into a small alley that is almost impossible to go through. Eventhough I chose a common or popular building, it directed me to their backways (dense residental areas). Why don't create a custom road option that enable feature to avoid small alley for cars? Just like you did in your "Avoid Ferries" or "Avoid freeways" and "Dirt Roads" kinda thing.

Please consider to avoid a backway/small alley that only fit and can hrough with only 1 car. Thanks.