don't worry - it isn't just the president. Dick Cheney visited Australia a few weeks ago and caused traffic chaos , including closing all 8 lanes of the Sydney harbour bridge so he could cross to have dinner with the Prime Minister (whose official residence is north of the harbour). What a pain in the arse!!
I wonder why he didn't take the train - even emptying out an entire train might have caused less disruption
The difference? Clinton didn't invade too many terrorist filled countries, so maybe the security requirement was slightly less.
On a bright note - he won't stay long.