What a pointless thing to say, aircraft always have right of way on taxi ways!
Well yes, but that doesn't stop some numbskull trying to nip across in front of that big slow ole bird rolling down the taxiway, and I don't think they realise just how long it takes to stop a loaded 747!
Think that the tower might have some explaining to do as to why they hadn't asked the truck to vacate the taxiway, or wait clear!