Up armored buses? Like the humvees? Or maybe we should make a whole new class of buses and subway trains with individual blast proof compartments for each passenger?/sar. (I hope you were kidding but in case your weren't a little sarcasm!)
Reminds me of a Don Martin cartoon from my youth.
A recently arrested peasant is dangling by his wrists from shackles on the wall of a dungeon. He angrily complains to the Roman gaurd that he was promised a private cell.
The next frame shows brick-layers walling him up where he hangs.(and yes....I was kidding)