I have done alot of driving in Australia, both for business, commuting, and holidays and feel I have a good appreciation of the state of the roads I have travelled over. My nomination for the scariest road in Australia is that monster stretch of highway between the Gold Coast and Brisbane. It is fairly unique in that every lane seems to be the fast lane, and like skiers traversing a slope, drivers zoom across multiple lanes with seemingly little regard for others. Maybe there is some special sense that they have in SEQLD where they can visualise a gap before it appears, but if one appears the cascade it sets off is terrifying. Sydney and Melbourne are tame by comparison.
Do you have a nomination?