Driving in an unfamiliar traffic regulation is associated with difficulties in adjusting with the new conditions and rules. Providing feedback in a proper way can help drivers overcome such difficulties. This paper aims to explore the most preferred feedback modality, feedback presenting time, and frequency of presenting feedback when turning left at a roundabout when driving in an unfamiliar traffic regulation, namely, a keep-left traffic regulation. Driving in a roundabout includes navigation, speed, and signal indication. Thirty-five participants who were not familiar with an Australian traffic regulation (i.e. keep-left and a right-hand driving vehicle) answered the online survey. We found that visual feedback is the most preferred modality in all driving tasks related to driving at a roundabout. Also, concurrent feedback is the most preferred feedback presenting time. There is no a particular preferred frequency to present the feedback. Our findings would help design the feedback system to assist the driver in such a driving condition.