Complex sentence: SOA has also been illustrated as a highway system, where if everyone had a car, but there was no highway anywhere, things would be limited and disorganized, in any attempt to get anywhere efficiently.
Split into simpler sentences: SOA has also been illustrated as a highway system providing efficiency. The point being that if everyone had a car, but there was no highway anywhere, things would be limited and disorganized, in any attempt to get anywhere efficiently.