I hate drive your roads, seeing as you way left of correct there. Camber more commonly referred to as cross-fall is generally fixed at 3% and is purely for run off of water. Super elevation is what you are thinking of on higher speed limit roads where the outside lane is lifted gradually to match the cross fall of the inside lane through the bend. This is purely for passenger comfort at higher speeds. It's a trick derived from rail lines although they leave out the spiral curve for roads as your not trying to coax 1000T train to change direction. You can download the main roads spec sheet and read all about it, including the k factor site distances and other boring **** that means the difference between life and death.