Thanks; glad you found it comment-worthy. It isn't exactly urban; it was a luggage rack on Amtrak--but the train is interurban. I was alert for something to shoot, and this solitary bright orange bag in a dimly lit space caught my notice. It turned out that the jiggling train didn't interfere with stability as much as expected.
for me there is a whole area of meaning - the bag is a kind of silent anthropomorphic element in a cold manufactured setting. then you have the whole journey, change, transition, anticipation, the red bringing tension into the composition. quite a powerful photograph.