In Oz rules pilots only have to report to me if they are more than 1 NM off track. If you fly a 0.9 offset I will not know it... unless you are ADS/C equipped when I will recieve an ADS track non compliance alert on my screen and will have to vary your clearance.
Do you go left or right? Does it depend if you are used to driving on the left or right side of the road???