Sorry, maybe it's because I'm not a LEO but honestly how dumb is it to set up or try to set up a roadblock right after a exit ramp to get off highway and also past the on ramp to get back on? ??? Really, to me that's sorta about as trying to fill a bucket with water that's has no bottom in it. And then pull a couple cars in the road with 3 lanes to go right thru them. Let's see, that's sorta like shutting the screen door but leaving the main door open and trying to keep the cold out.
All I see is an educational video on how easy it is to ride around a roadblock.
Seen one.