Driving schools that focus on competency instead of making money could reduce the road toll considerably !

99% of roundabouts nave negative camber, now if the camber was positive they would be safer but negative camber allows water to drain away without the expense of drainage pipes.

The roundabout on the junction of the New England and Gwydir Highways has negative camber that caused a cattle truck to overturn when the cattle moved with the tilt from the camber.

The same roundabout is in the process of being visually obstructed, the council has installed a sculpture(?) made from split and discarded sewer mains or somesuch, there are undoubtedly trees and shrubs to complete the picture to the detriment of unfortunate motorists.

Is Mise, do you actually mean camber? Or do you mean cant?

Aidan,

The use can be confusing, but I meant camber as applied to roads not as applied to vehicle wheels.
http://engineeringdiscoveries.com/2019/06/22/types-of-road-camber-advantages-disadvantages-and-methods-of-providing-camber/