Research on intersection safety has been mostly focused on regions with car-dominated traffic and proper lane discipline. However, with improper design and control measures, two-wheeler dominated traffic and deficiency in driver awareness, illegal traffic movements are seen at many intersections in India. An illegal movement is a movement which is not accepted as per the prevailing rules of the road. As drivers may not expect such movements, the chances of crash may increase. An analysis of the potential for additional crashes due to illegal movements is necessary to develop and justify measures to prevent illegal movements. Since crashes are rare events and there is no sufficient crash data available, in this study, the authors analyse traffic conflicts as a surrogate to crashes. They aim to explore how the type and severity of conflicts involving illegal movements differ from those involving only legal movements. Further, they aim to identify whether the intersection records a higher rate of conflicts as the proportion of illegal movements increases. Considering the video-graphic traffic data from 2015 at a suburban intersection on NH 163 in Warangal, they analyse the traffic conflicts happening due to legal and illegal traffic movements. They find that nearly 30% of all local turns during the study period are illegal turns. The data also shows that illegal turns contribute to higher rate of conflicts and more severe conflicts than legal turns. This study helps to develop and justify measures to prevent illegal movements and the resultant crashes at intersections.