I knew there were two different styles of service doors. (Maybe more than two, please let me know if there are any others.)
The first type I'm thinking of folds inward...
The second type has two separate doors that swing outwards...
But today I realized that both different types were available on the same year of the same model of a given bus. I'd always thought that a particular model was just designed with whatever type of door the engineers spec'ed it with. Evidently door type is an option though.
My question is what factors would cause a customer to choose one door option over the other. Does it have to do with what type of opener mechanism is spec'ed?
Any insight is greatly appreciated. This's the kind of thing that drives me nuts once I realize it. Thanks in advance!
edit: Yeah, I know the buses pictured aren't the same model. Those're just the best pictures I could find of the two door types.