This paper describes the safety assessment results of level 2 automated vehicles in cut-in and overlap cut-in collision situations. The test results were compared with typical rear-end and 50% overlap rear-end collisions. From analysis of NASS CDS data, cut-in rear-end accidents occur at a rate of 25% out of rear-end accidents. The cut-in and 50% overlap cut-in situation were tested for the evaluation of level-2 automated vehicles. Main parameters of the cut-in scenario are speed of vehicles, TTC(Time to collision) and TLC(Time to lane changing). The speed of vehicles for scenario composition was selected from NASS CDS data analysis. The speed of the vehicle target was selected at 20km/h. The speed of the VUT(Vehicle Under Test) consisted of 5 types:​ 30, 40, 50,60 and 70 km/h.

Cut-in scenarios were designed with TTC 4 seconds and the target vehicle changes the lane to the front of the test vehicle at each TTC. The target vehicle’s TLC was set to 2 seconds at all scenarios. For comparison, rear-end collision and 50%-offset rear-end collision scenarios suggested by EuroNCAP 2018 were also tested. A low platform robot vehicle target was utilized for all test scenarios. The low platform robot vehicle and a balloon dummy were used to imitating the causative vehicle in the accident and reproduce the accident situation. The robot vehicle target and the VUT were communicated with their position, speed, and acceleration data from GPS INS data. The data were recorded for further analysis.