I was looking around and on line sources seem to say 4-6 weeks to bloom. So you might need to just wait a little more.
Note too though, that if I'm remembering right, fall blooming crocuses send up the flower stalk first. So compacted soil from foot traffic is not really the best thing, and when they do emerge, the shoots will be delicate and easily kicked over/damaged.
I think you might want to strengthen the barricade and keep anyone from trampling that area.