The whole concept in those times of the Emperor and
his ah...entourage traveling. Wonder what the lead time was for the provinces on the fact that he was coming and when he would arrive? Bet many a
provincial governer leapt up spilling
his wine
cup and exclaming:
"By the gods! The emperor here in 5 months? Why? Is he going to execute me? We must prepare!
Raise taxes immediately! Ohhh...what will it cost to support the traveling court for who knows how many months? Why me?
All conjecture of course but...
And from what I've read
Hadrian left a sort of "to do" list to put it mildly. He didn't stay to see
his commands/projects to completion.
Build a wall. Build a temple. Improve sanitation. Prepare a "donative" to the people. About ______ sesterci will be about right for the common folk, more for the soldiers.
The logistics of the whole thing must have been fascinating.
And it was mostly done. The power of the emperor of Rome's commands.