That convoy is Yuge, but obviously positioned based on the assumption that there will not be any air power anytime soon. Otherwise they would just be sitting ducks to be ripped from head to arsehole - 40 miles long. I remember back in the first gulf war when the Iraquis had these huge long convoys like that when they were retreating from Kuwait, and the American air power just ripped the shiite out of them like it was a buffet line.
Unfortunately, does not look like that air power is coming soon enough, if at all.
I am open to being surprised but the timing is not good.