about 4 years ago - Avanya - Direct link
1) The type of road determines what a bus stop will look like. For some it's just a post, for others there's a shelter. You can get bus shelters on the workshop as well, which can be placed at a stop as decoration if you want it to look better. If you want to get rid of the default bus shelther as well, there's a mod for that.

https://steamcommunity.com/sharedfiles/filedetails/?id=919020932&searchtext=shelter