Unfortunately, it will have to be the city bus, but he may meet schoolmates at the central station.
I mentioned our concerns to the program coordinator and he assured me that it's always the parents who are super apprehensive - the kids don't mind, after two weeks it's as if they've never done anything else.

We may not have to bother choosing - I was early to pick DS9 up and while they had put up a nice little sign on the door "exam in progress quiet please" no one cared that recess was in full swing in front LOL! DS thought that he might have messed up a lot of questions during all that racket but who knows. At least they're quick, I get the results on Thursday.