If you search for FCA on google maps around the Detroit area, you can spot 4 or 5 big lots that had many many trucks parked in rows when the photos were taken. So, yeah, sometimes they stack up for whatever reason, awaiting chips, autoracks, shipping......
In my case, the sudden 4 week shift in ETA had something to do with the transfer to the rail carrier. It went from 6/29 not shipped to 7/31 not shipped to 7/3 in the space of two days. The dealer told me it was last in Ohio as of today. I presumed it had been loaded yesterday onto the Norfolk Southern train that runs to the Chicago area daily for the interchange with Union Pacific. Now I get to see how many railyards it loiters at along the way.