The odds any of us would be stopped by a protest for any appreciable length of time are remote, I think. I've seen two marches around here in person. They do obstruct traffic for 30 minutes or so. There are enough side streets to get around them. They didn't make an effort to obstruct traffic, they just marched and chanted, mostly young white folks marching about BLM. I suspect many of them felt they had done something useful and after the march patted each other on the back for their signaling and went to a bar somewhere.
Both had police escort, which I found a bit ironic.