I did a week for Lynx Parcels a few years ago.
The job was to take a trailer from Birmingham to the hub at Nuneaton, swap trailers, go to Marsh Barton in Exeter, swap trailers, have a break, go back to Nuneaton, yes, you’ve guessed it - swap again then finish the run at Landor St. in B/ham.
The first day I dropped the trailer at the hub, while reversing in-to a space, the rear wheels bounced while I was reversing.
’ Oh No ’ I thought. ’ I’ve hit something.
On getting out, I found that there were 2 blocks you had to reverse over.
On asking a shunter, he told me that they had had some run-aways, and the blocks stopped the units and trailers rolling in-to the hub if drivers " Forgot the procedure ".
Cheap but effective.
Cheers,
Niall.