def is_road_line(cls, line):
        """
        This function relates to is_road_edge. We will have different processing when treating a line that
        is in the boundary or not.
        """
        return line in [
            cls.LINE_UNKNOWN, cls.LINE_BROKEN_SINGLE_WHITE, cls.LINE_SOLID_SINGLE_WHITE, cls.LINE_SOLID_DOUBLE_WHITE,
            cls.LINE_BROKEN_SINGLE_YELLOW, cls.LINE_BROKEN_DOUBLE_YELLOW, cls.LINE_SOLID_SINGLE_YELLOW,
            cls.LINE_SOLID_DOUBLE_YELLOW, cls.LINE_PASSING_DOUBLE_YELLOW
        ]

        This function relates to is_road_edge. We will have different processing when treating a line that
        is in the boundary or not.
        
metadrive/type.py