[uptown]

Not sure about Sydney, but there's no international law stating that you can't drive for 16 hours straight.

[PeterisP]

I was under the impression that all civilized countries do have such laws - the impact on accidents and fatalities is really huge.

Throughout almost all of Europe cargo haul & bus drivers hours are regulated (registrating devices at the vehicle + enforcement by traffic cops), and you can't take a truck across the continent w/o rest unless you swap drivers.