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-4.231762166, "lead_valid": 1.0, "distance_m": 45.1649856567, "relative_speed_mps": -9.1747398376, "lead_y_m": -5.5493941307, "ttc_s": 4.922753828, "thw_s": 3.1502616619, "thw_moving_s": 3.1502616619 }, { "t": -4.176992022, "lead_valid": 1.0, "distance_m": 46.5977249146, "relative_speed_mps": -7.5881228447, "lead_y_m": -5.863984108, "ttc_s": 6.140876455, "thw_s": 3.2781106867, "thw_moving_s": 3.2781106867 }, { "t": -4.128706032, "lead_valid": 0.0, "distance_m": 0.0, "relative_speed_mps": 0.0, "lead_y_m": 0.0, "ttc_s": null, "thw_s": null, "thw_moving_s": null }, { "t": -4.078358826, "lead_valid": 0.0, "distance_m": 0.0, "relative_speed_mps": 0.0, "lead_y_m": 0.0, "ttc_s": null, "thw_s": null, "thw_moving_s": null }, { "t": -4.028831168, "lead_valid": 0.0, "distance_m": 0.0, "relative_speed_mps": 0.0, "lead_y_m": 0.0, "ttc_s": null, "thw_s": null, "thw_moving_s": null } ], "note": "低TTC末段之后目标消失；需结合大相对速度、距离变动、视频弯道遮挡，不能当连续同一前车追尾。事前减速时脚刹标志0但控制请求负值。" }