How are off-wing jet engines transported? One of the optional services in Rolls-Royce TotalCare is "Engine Transportation"


  This service includes routine transportation of engines between the customer’s main base (or designated station) and the engine shop, and/or remote site transportation.


Jet engines can be very large heavy and expensive items. How are they transported? Are they flown or do they use road transport? Are there dedicated vehicles?
They have the usual transport options: shove into cargo area, on a flatbed truck, shipping container,...

They can also be attached below the wing of a large aircraft and flown with if there is no room in the cargo area.

(stolen from this question)

Notice the extra engine on the near wing.