High motorization and growing population have exacerbated traffic congestion in metropolitan areas, which has had a detrimental influence on the functioning of the road network and resulted in longer delay, pollution, decreased productivity, increased fuel usage, and other significant socioeconomic repercussions. Urban road networks are frequently congested by traffic incidents, which reduce capacity and pose risks to the driver (s) of subject vehicle (s), road users around the place of incident, and the incident response team. Each traffic incident may have an impact ranging in terms of road network area and time duration. To determine this, existing studies have been reviewed systematically. This investigation was carried out using a thorough evaluation of previous peer-reviewed literature, standards, and formal guidelines. During this review process, the causes of incident as well as the impact have been studied with respect to traffic incident duration, traffic incident frequency, travel time reliability, and network vulnerability analysis aspects. The primary goal of this study is to pinpoint research gaps concerning vehicle incidents. One such gap pertains to the necessity for a more detailed analysis of incidents, focusing on disaggregation. Particularly, more study is needed to delve deeper into the most prevalent incident, vehicle breakdowns (due to mechanical problem and/or as a result of an accident) are to be further studied regarding the location of incident, i.e., mid-block, intersection, flyover/freeways, and the position of vehicle within the width of the road.
