You can certainly have all the cameras that you need but if the bad guys have their faces covered and identifying marks hidden then you're not going to be able to do much.
I'm pretty sure there is an early scene in the movie Solar Crisis[1] that plays out similarly to what you're describing. This movie was on one of the cable movie channels when I was growing up, so I got a higher-than-normal dose of it.
I don't remember a cow, though (but then this probably isn't the only sci-fi movie out there with such a scene). I think one of the characters first parked a motorcycle in the road, but the truck plowed through it. After that, they stood in the road instead, and that caused the truck to screech to a stop right in front of them, blasting a message on a PA about how they were breaking the law by impeding it.
Ther is always a way.
Re all the edge cases - yeah that'll take a while.