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To minimize the risk of run-off-road collision, new technology in Advanced Driver Assistive System (ADAS), called Road Departure Mitigation Systems (RDMS), is being introduced recently. Most of the RDMS rely on clear lane markings to detect road departure events using the camera for decision-making and control actions. However, many roadsides do not have lane markings or clear lane markings, especially in some rural and residential areas. The absence of lane markings forces RDMS to observe roadside objects and road edge and use them as a reference to determine whether a roadway departure incident is happening or not. To support and guide for developing and evaluating RDMS, a testing environment with representative road edges needs to be established. Since the grass road edge is the most common in the US, the grass road edge should be included in a testing environment.