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Nobody has really said why they needed maintenance. Just that they were doing maintenance on them in preparation for the Super Bowl. Being maintenance, I assume it was to make sure they properly functioned during the Super Bowl, not a situation where stuff was stuck in them and they needed to be repaired. But, I don't really know.As for maintenance on the retractable bollards...the problem is things getting stuck down in the gap, like Mardi Gras beads and various other things, am I correct? If that is a problem, why can't they just add a cap to them with a flange that fans out a few inches? Basically just a protection measure, and it would add a slight bump, like a speed strip when retracted. I've seen this in other places.
It's been awhile since I looked at them, and I never really took a very close look obviously, but my recollection is that there isn't much of a gap where stuff could fall in and get stuck.