Even if the driver try to obey all traffic rules, but sometimes they have to break these few traffic rules, that is exceeding speed limit and cutting queue due to emergency/urgency, like rushing to the hospital (either sending patients or a doctor on the way to save patient's life after received a call), appointment with clients (esp. for salesperson with tight schedule), or parents want you to show up and sign some important documents. However, when overtake those heavy vehicle on highways, if the road ahead is clear and there is no potential speedtrap, i usually get past them as soon as possible and for cutting queue scenario, sometimes it was unintentional due to road design or toll plaza placement (eg. LDP Sunway toll plaza, from Puchong towards PJ) and signboard placement just before the flyover (with left side road jammed due to traffic light and he/she want to turn left)
Another one is left-lane overtaking thanks to few idiots likes to hog the road as if their father owns the road (sometimes, it's not our choice cause flash/honk will maybe provoke those 'natang'). In honesty, these road hoggers that hog the right lane and thinks they are right to do so deserves to have a good beating with hockey/golf stick towards their head

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In crowded area where parking place was limited, illegal/double parking usually will occur. For me, if one has no choice but to double park, at least leave the driver's mobile phone at the dashboard. On flat surface, leave the handbrake down/gear in neutral.