I’d question whether Comcast or anyone like that would have the legal ability to close down a road. I imagine it requires permits and planning.
So:
I know that those cops you see at construction sites doing that - they aren’t there in official capacity. Much like cops working security at Walmart or whatever, it is an after hours gig. The road construction company pays them to sit their with their lights on because it makes people slow down and pay attention faster and better than anything else, like concern for worker safety.
