{
  "version": "1.0-openlabel-compat",
  "source": {
    "url": "https://youtu.be/w3SZVPiNxDU",
    "title": "Rider Cam Delivery Ego Centric Sample (clip 03 · 390-450s · dropoff to doorman)",
    "downloaded_resolution": "568x320",
    "fps_source": 30,
    "clip_window_s_absolute": [390, 450],
    "clip_window_s_relative": [0, 60],
    "annotator": "claude-opus-4-7 (AI pre-annotation, NOT production-grade)",
    "annotation_layers": ["L1_detection_tracking", "L3_ego_state", "L5_captions"],
    "honest_confidence_notes": [
      "Same disclaimers: bbox eyeballed, distance bucket visual-only, track IDs may switch.",
      "This clip captures a FULL delivery dropoff: slow approach → stop → dismount → walk to door → meet doorman → handoff → remount → ride away. Most narrative-rich of the three samples.",
      "Doorman appears clearly (white shirt + black vest); bbox around face is visible but face NOT masked in this preview (mask in production).",
      "The actual handoff (t=24-26s) is partially occluded by ego's hand entering frame — bbox confidence drops here."
    ]
  },
  "sampling": {
    "mode": "0.5fps_base_plus_event_keyframes",
    "base_fps": 0.5,
    "base_frames_count": 30,
    "event_keyframes_count": 6,
    "total_frames": 36,
    "event_keyframe_t_s_relative": [11, 15, 21, 25, 27, 43],
    "event_keyframe_t_s_absolute": [401, 405, 411, 415, 417, 433],
    "event_keyframe_rationale": {
      "11": "rolling toward curb; revolving door visible — moments before stop",
      "15": "stopped at curb, hand reaches for unlock / bag — pre-dismount",
      "21": "doorman walks out from revolving door toward rider — handoff prep",
      "25": "doorman face-to-face with rider, mid-handoff",
      "27": "post-handoff, rider remounting and pulling away",
      "433": "left-turn-prohibited intersection encountered en route away"
    }
  },
  "scene_meta": {
    "weather": "clear",
    "lighting": "early_afternoon_strong_sun",
    "location_guess": "Upper West Side / Riverside Drive area, NYC — pre-war apartment building with construction scaffolding over the sidewalk, revolving door entrance, tree-lined street with park edge",
    "road_types_observed": ["park_edge_street", "sidewalk_scaffolded", "building_entrance_curb", "wide_residential_avenue", "marked_intersection"],
    "camera_mount": "chest_or_helmet_first_person",
    "audio_quality": "not_analyzed",
    "task_phase": "dropoff_completion"
  },
  "track_registry": {
    "200": "ego_scooter_handlebar_dashboard",
    "201": "bmw_black_ahead",
    "202": "destination_building_entrance",
    "203": "scaffolding_overhead_sidewalk",
    "204": "pedestrian_yellow_safety_vest_distant",
    "205": "revolving_door_glass",
    "206": "doorman_white_shirt_black_vest",
    "207": "delivery_bag_food_package",
    "208": "ego_shadow_on_sidewalk",
    "209": "traffic_light_intersection",
    "210": "no_left_turn_sign",
    "211": "white_sedan_intersection",
    "212": "parked_car_line_avenue",
    "213": "silver_sedan_oncoming",
    "214": "red_sedan_parked",
    "215": "park_railing_left",
    "216": "tree_line_park_edge",
    "217": "construction_scaffolding_vertical_post",
    "218": "doorman_mat_at_entrance",
    "219": "yellow_safety_cone_far",
    "220": "trash_can_curb"
  },
  "frames": [
    {
      "frame_id": 200, "t_s": 0, "src": "t001.jpg",
      "scene": "park_edge_street", "phase": "approach_dropoff_block",
      "objects": [
        {"id": 201, "class": "bmw_black_ahead", "bbox": [305, 165, 460, 250], "occ": "light", "dist": "near", "motion": "slow", "interacts_with_ego": "ahead_in_lane"},
        {"id": 215, "class": "park_railing_left", "bbox": [0, 165, 175, 280], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 216, "class": "tree_line_park_edge", "bbox": [0, 0, 215, 200], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_handlebar", "bbox": [0, 195, 540, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_scanning_for_address", "phone_in_hand": false, "delivery_bag_visible": "behind_ego"}
    },
    {
      "frame_id": 201, "t_s": 2, "src": "t002.jpg",
      "scene": "approach_scaffolded_block", "phase": "slowing_to_destination",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [220, 75, 568, 220], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 217, "class": "scaffolding_vertical_post", "bbox": [320, 130, 360, 245], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 215, "class": "park_railing_left", "bbox": [0, 215, 155, 285], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_handlebar", "bbox": [0, 195, 540, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "weave_right_to_curb", "gaze": "forward_right_seeking_entrance", "phone_in_hand": false, "delivery_bag_visible": "behind_ego",
        "annot_action": "approach_dropoff_curbside"}
    },
    {
      "frame_id": 202, "t_s": 4, "src": "t003.jpg",
      "scene": "approach_scaffolded_block", "phase": "slowing_to_destination",
      "objects": [
        {"id": 204, "class": "pedestrian_yellow_safety_vest", "bbox": [305, 80, 395, 235], "occ": "light", "dist": "mid", "motion": "slow", "interacts_with_ego": "ahead_on_sidewalk"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [185, 0, 568, 215], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 217, "class": "scaffolding_vertical_post", "bbox": [330, 0, 375, 295], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "medium", "lean_angle_deg": 0, "steering_intent": "weave_right", "gaze": "forward_right", "phone_in_hand": false, "delivery_bag_visible": "behind_ego"}
    },
    {
      "frame_id": 203, "t_s": 6, "src": "t004.jpg",
      "scene": "curb_approach", "phase": "near_stop_at_entrance",
      "objects": [
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [225, 0, 510, 245], "occ": "light", "dist": "near", "motion": "stationary", "interacts_with_ego": "destination_ahead"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [205, 0, 568, 175], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 218, "class": "doorman_mat", "bbox": [255, 245, 460, 320], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "medium", "lean_angle_deg": 0, "steering_intent": "weave_right_curb", "gaze": "forward_to_entrance", "phone_in_hand": false, "delivery_bag_visible": "behind_ego",
        "annot_action": "approach_doorman_entrance"}
    },
    {
      "frame_id": 204, "t_s": 8, "src": "t005.jpg",
      "scene": "at_curb", "phase": "rolling_to_stop",
      "objects": [
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [215, 0, 568, 270], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [205, 0, 568, 140], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_mirror_left", "bbox": [0, 90, 105, 260], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "medium", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_right_to_entrance", "phone_in_hand": false, "delivery_bag_visible": "behind_ego",
        "annot_action": "rolling_to_stop_at_dropoff"}
    },
    {
      "frame_id": 205, "t_s": 10, "src": "t006.jpg",
      "scene": "stopped_at_entrance", "phase": "stopped_at_dropoff",
      "objects": [
        {"id": 205, "class": "revolving_door_glass", "bbox": [225, 55, 405, 245], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [120, 0, 555, 245], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [60, 0, 555, 125], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_handlebar", "bbox": [0, 175, 460, 320], "occ": "none", "dist": "near", "motion": "stationary", "note": "scooter is now stationary at the curb"}
      ],
      "ego": {"mode": "mounted", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "hard", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_at_door", "phone_in_hand": false, "delivery_bag_visible": "behind_ego",
        "annot_action": "delivery_arrive_dropoff"}
    },
    {
      "frame_id": 206, "t_s": 11, "src": "e401.jpg", "is_event_keyframe": true,
      "scene": "stopped_at_entrance", "phase": "stopped_pre_dismount",
      "objects": [
        {"id": 205, "class": "revolving_door_glass", "bbox": [255, 45, 410, 230], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [115, 0, 568, 240], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [115, 0, 568, 100], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_dashboard", "bbox": [105, 175, 460, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "mounted", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "hard", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_at_door", "phone_in_hand": false, "delivery_bag_visible": "behind_ego",
        "annot_action": "stopped_waiting_for_doorman"}
    },
    {
      "frame_id": 207, "t_s": 12, "src": "t007.jpg",
      "scene": "stopped_at_entrance", "phase": "stopped_prep_dismount",
      "objects": [
        {"id": 205, "class": "revolving_door_glass", "bbox": [205, 50, 350, 245], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [100, 0, 555, 245], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 200, "class": "ego_scooter_handlebar_mirror", "bbox": [275, 170, 460, 290], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "mounted", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "hard", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_at_door", "phone_in_hand": false, "delivery_bag_visible": "behind_ego"}
    },
    {
      "frame_id": 208, "t_s": 14, "src": "t008.jpg",
      "scene": "stopped_at_entrance", "phase": "dismount_retrieve_bag",
      "objects": [
        {"id": 200, "class": "ego_scooter_handlebar", "bbox": [0, 0, 568, 320], "occ": "none", "dist": "near", "motion": "stationary", "note": "close-up of handlebars during dismount"},
        {"id": 207, "class": "delivery_bag_food_package", "bbox": [440, 195, 555, 320], "occ": "heavy", "dist": "near", "motion": "slow", "interacts_with_ego": "in_ego_hand"},
        {"id": 206, "class": "doorman_distant_silhouette", "bbox": [285, 0, 350, 110], "occ": "heavy", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "dismounting", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "hard", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "down_at_handlebar_and_bag", "phone_in_hand": false, "delivery_bag_visible": "in_hand",
        "annot_action": "delivery_dismount_retrieve_package"}
    },
    {
      "frame_id": 209, "t_s": 15, "src": "e405.jpg", "is_event_keyframe": true,
      "scene": "stopped_at_entrance", "phase": "dismount_with_bag",
      "objects": [
        {"id": 200, "class": "ego_scooter_handlebar", "bbox": [0, 0, 568, 320], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 207, "class": "delivery_bag_food_package", "bbox": [430, 220, 510, 320], "occ": "heavy", "dist": "near", "motion": "slow", "interacts_with_ego": "in_ego_hand"},
        {"id": 206, "class": "doorman_distant", "bbox": [300, 5, 365, 110], "occ": "heavy", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "dismounted_with_bag", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "hard", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_to_door", "phone_in_hand": false, "delivery_bag_visible": "in_hand"}
    },
    {
      "frame_id": 210, "t_s": 16, "src": "t009.jpg",
      "scene": "sidewalk_walking_to_door", "phase": "walk_to_entrance",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [115, 0, 568, 130], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 206, "class": "doorman_at_door", "bbox": [490, 105, 555, 200], "occ": "heavy", "dist": "mid", "motion": "slow", "interacts_with_ego": "approaching_ego"},
        {"id": 208, "class": "ego_shadow_on_sidewalk", "bbox": [195, 215, 405, 320], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 207, "class": "delivery_bag_food_package", "bbox": [410, 270, 470, 320], "occ": "heavy", "dist": "near", "motion": "slow"}
      ],
      "ego": {"mode": "walking", "speed_bucket": "walking", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "forward_to_doorman", "phone_in_hand": false, "delivery_bag_visible": "in_hand",
        "annot_action": "delivery_walk_to_door"}
    },
    {
      "frame_id": 211, "t_s": 18, "src": "t010.jpg",
      "scene": "sidewalk_approach_door", "phase": "doorman_emerges",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [225, 75, 335, 285], "occ": "light", "dist": "near", "motion": "slow", "interacts_with_ego": "approaching_ego"},
        {"id": 205, "class": "revolving_door_glass", "bbox": [195, 30, 425, 280], "occ": "heavy", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [50, 0, 568, 245], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 203, "class": "scaffolding_overhead", "bbox": [50, 0, 305, 75], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 208, "class": "ego_shadow_on_sidewalk", "bbox": [80, 245, 200, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "walking", "speed_bucket": "walking", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "forward_to_doorman", "phone_in_hand": false, "delivery_bag_visible": "in_hand",
        "annot_action": "delivery_meet_doorman"}
    },
    {
      "frame_id": 212, "t_s": 20, "src": "t011.jpg",
      "scene": "doorman_approaches", "phase": "doorman_walks_to_ego",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [180, 35, 320, 320], "occ": "none", "dist": "near", "motion": "slow", "interacts_with_ego": "walking_toward_ego"},
        {"id": 205, "class": "revolving_door_glass", "bbox": [165, 30, 425, 290], "occ": "heavy", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [0, 0, 568, 245], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "standing_at_door", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "at_doorman_face", "phone_in_hand": false, "delivery_bag_visible": "in_hand"}
    },
    {
      "frame_id": 213, "t_s": 21, "src": "e411.jpg", "is_event_keyframe": true,
      "scene": "doorman_walks_out", "phase": "handoff_prep",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [180, 45, 325, 320], "occ": "none", "dist": "near", "motion": "slow", "interacts_with_ego": "approaching_ego"},
        {"id": 205, "class": "revolving_door_glass", "bbox": [150, 25, 430, 290], "occ": "heavy", "dist": "near", "motion": "stationary"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [0, 0, 568, 245], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "standing_at_door", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "at_doorman_face", "phone_in_hand": false, "delivery_bag_visible": "in_hand",
        "annot_action": "delivery_doorman_emerges"}
    },
    {
      "frame_id": 214, "t_s": 22, "src": "t012.jpg",
      "scene": "face_to_face_doorman", "phase": "pre_handoff",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [180, 0, 400, 320], "occ": "none", "dist": "near", "motion": "slow", "interacts_with_ego": "face_to_face_close"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [0, 0, 568, 245], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "standing_at_door", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "at_doorman_face", "phone_in_hand": false, "delivery_bag_visible": "in_hand",
        "annot_action": "delivery_pre_handoff"}
    },
    {
      "frame_id": 215, "t_s": 24, "src": "t013.jpg",
      "scene": "handoff_moment", "phase": "customer_handoff",
      "risk_flag": "EVENT_T1_delivery_handoff",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [165, 0, 425, 320], "occ": "light", "dist": "near", "motion": "slow", "interacts_with_ego": "receiving_handoff"},
        {"id": 207, "class": "delivery_bag_food_package", "bbox": [165, 235, 365, 320], "occ": "heavy", "dist": "near", "motion": "slow", "interacts_with_ego": "being_handed_off"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [0, 0, 568, 235], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "standing_at_door", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "down_at_hands_during_handoff", "phone_in_hand": false, "delivery_bag_visible": "passing_to_doorman",
        "annot_action": "delivery_customer_handoff"}
    },
    {
      "frame_id": 216, "t_s": 25, "src": "e415.jpg", "is_event_keyframe": true,
      "scene": "handoff_moment", "phase": "customer_handoff",
      "risk_flag": "EVENT_T1_delivery_handoff",
      "objects": [
        {"id": 206, "class": "doorman_white_shirt_black_vest", "bbox": [165, 0, 425, 320], "occ": "light", "dist": "near", "motion": "slow", "interacts_with_ego": "receiving_handoff_close"},
        {"id": 207, "class": "delivery_bag_food_package", "bbox": [185, 240, 365, 320], "occ": "heavy", "dist": "near", "motion": "slow", "interacts_with_ego": "being_passed"},
        {"id": 202, "class": "building_entrance_with_awning", "bbox": [0, 0, 568, 235], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "standing_at_door", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "n/a", "gaze": "down_at_hands", "phone_in_hand": false, "delivery_bag_visible": "passing_to_doorman"}
    },
    {
      "frame_id": 217, "t_s": 26, "src": "t014.jpg",
      "scene": "post_handoff_remount_area", "phase": "remount_scooter",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [50, 0, 568, 165], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 217, "class": "scaffolding_vertical_post", "bbox": [255, 0, 320, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "remounting", "speed_bucket": "stopped", "pedal_state": "n/a", "brake_intensity": "n/a", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_left_check", "phone_in_hand": false, "delivery_bag_visible": false,
        "annot_action": "delivery_handoff_complete_remount"}
    },
    {
      "frame_id": 218, "t_s": 27, "src": "e417.jpg", "is_event_keyframe": true,
      "scene": "post_handoff_under_scaffolding", "phase": "pull_away_from_dropoff",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [0, 0, 568, 170], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 217, "class": "scaffolding_vertical_post", "bbox": [240, 0, 320, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "mounted", "speed_bucket": "stopped_to_slow", "pedal_state": "throttle_resuming", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false,
        "annot_action": "delivery_resume_navigation"}
    },
    {
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      "scene": "pull_away_park_edge", "phase": "depart_dropoff",
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        {"id": 216, "class": "tree_line_park_edge", "bbox": [80, 0, 410, 245], "occ": "none", "dist": "mid", "motion": "stationary"},
        {"id": 215, "class": "park_railing_left", "bbox": [50, 195, 320, 250], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 220, "t_s": 30, "src": "t016.jpg",
      "scene": "pull_away_past_workers", "phase": "depart_dropoff",
      "objects": [
        {"id": 204, "class": "pedestrian_yellow_safety_vest", "bbox": [220, 175, 290, 270], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 220, "class": "trash_or_bin_green", "bbox": [10, 215, 105, 320], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": 216, "class": "tree_line_park_edge", "bbox": [55, 0, 460, 200], "occ": "none", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 221, "t_s": 32, "src": "t017.jpg",
      "scene": "under_scaffolding_riding", "phase": "depart_dropoff",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [130, 0, 568, 160], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 217, "class": "scaffolding_vertical_post", "bbox": [165, 0, 220, 285], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 222, "t_s": 34, "src": "t018.jpg",
      "scene": "under_scaffolding", "phase": "depart_dropoff",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [165, 0, 568, 170], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 208, "class": "ego_shadow_on_sidewalk", "bbox": [305, 230, 425, 320], "occ": "none", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 223, "t_s": 36, "src": "t019.jpg",
      "scene": "clear_of_scaffolding", "phase": "resume_cruise",
      "objects": [
        {"id": 216, "class": "tree_line_park_edge", "bbox": [25, 0, 380, 145], "occ": "none", "dist": "near", "motion": "stationary"},
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      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
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      "scene": "park_edge_cruise", "phase": "resume_cruise",
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        {"id": 203, "class": "scaffolding_overhead", "bbox": [305, 0, 568, 170], "occ": "none", "dist": "near", "motion": "stationary"},
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        {"id": 215, "class": "park_railing_left", "bbox": [60, 165, 285, 215], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
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    {
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      "scene": "park_edge_cruise", "phase": "resume_cruise",
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        {"id": "bg.ped_far", "class": "pedestrian_far", "bbox": [340, 160, 365, 215], "occ": "none", "dist": "far", "motion": "slow"},
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        {"id": 216, "class": "tree_line_park_edge", "bbox": [45, 0, 405, 140], "occ": "none", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
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        {"id": 210, "class": "no_left_turn_sign", "bbox": [165, 75, 220, 145], "occ": "none", "dist": "mid", "motion": "stationary"},
        {"id": "bg.pkg_box_red", "class": "red_postbox_far_right", "bbox": [365, 100, 395, 175], "occ": "none", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_check_signs", "phone_in_hand": false, "delivery_bag_visible": false,
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    },
    {
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      "scene": "approach_intersection", "phase": "check_signs_and_traffic",
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        {"id": 209, "class": "traffic_light_red", "bbox": [305, 80, 345, 145], "occ": "none", "dist": "mid", "motion": "stationary"},
        {"id": 210, "class": "no_left_turn_sign", "bbox": [155, 70, 220, 140], "occ": "none", "dist": "mid", "motion": "stationary"},
        {"id": "bg.cars_intersection", "class": "vehicle_traffic_crossing", "bbox": [340, 165, 395, 200], "occ": "light", "dist": "far", "motion": "slow"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_check_signs", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 228, "t_s": 44, "src": "t023.jpg",
      "scene": "at_intersection", "phase": "cross_or_stop",
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        {"id": 211, "class": "white_sedan_intersection", "bbox": [225, 160, 320, 225], "occ": "light", "dist": "mid", "motion": "slow", "interacts_with_ego": "ahead_crossing"},
        {"id": 204, "class": "pedestrian_yellow_safety_vest", "bbox": [330, 95, 370, 225], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": "bg.cars_intersection", "class": "vehicle_traffic_far", "bbox": [395, 165, 460, 200], "occ": "light", "dist": "far", "motion": "slow"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "slow", "pedal_state": "coast", "brake_intensity": "soft", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward_track_traffic", "phone_in_hand": false, "delivery_bag_visible": false}
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      "frame_id": 229, "t_s": 46, "src": "t024.jpg",
      "scene": "post_intersection_avenue", "phase": "enter_wide_avenue",
      "objects": [
        {"id": "bg.silver_suv", "class": "silver_suv_oncoming", "bbox": [320, 130, 405, 220], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [275, 145, 320, 180], "occ": "light", "dist": "mid", "motion": "stationary"},
        {"id": 215, "class": "park_railing_left", "bbox": [55, 155, 235, 245], "occ": "light", "dist": "near", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 230, "t_s": 48, "src": "t025.jpg",
      "scene": "wide_avenue_cruise", "phase": "cruise",
      "objects": [
        {"id": "bg.silver_sedan", "class": "silver_sedan_oncoming", "bbox": [385, 175, 470, 235], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [305, 160, 460, 210], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 231, "t_s": 50, "src": "t026.jpg",
      "scene": "wide_avenue_cruise", "phase": "cruise",
      "objects": [
        {"id": "bg.silver_sedan", "class": "silver_sedan_oncoming", "bbox": [340, 170, 460, 225], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [310, 170, 460, 215], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 232, "t_s": 52, "src": "t027.jpg",
      "scene": "wide_avenue_cruise", "phase": "cruise",
      "objects": [
        {"id": 213, "class": "silver_sedan_oncoming", "bbox": [285, 155, 430, 235], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [365, 170, 460, 210], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 233, "t_s": 54, "src": "t028.jpg",
      "scene": "wide_avenue_cruise", "phase": "cruise",
      "objects": [
        {"id": "bg.silver_sedan_mid", "class": "silver_sedan_mid", "bbox": [305, 155, 395, 215], "occ": "light", "dist": "mid", "motion": "slow"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [320, 165, 470, 215], "occ": "light", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 234, "t_s": 56, "src": "t029.jpg",
      "scene": "wide_avenue_cruise", "phase": "cruise",
      "objects": [
        {"id": 214, "class": "red_sedan_parked", "bbox": [380, 165, 475, 230], "occ": "light", "dist": "near", "motion": "stationary"},
        {"id": "bg.silver_sedan", "class": "silver_sedan_distant", "bbox": [305, 160, 365, 200], "occ": "light", "dist": "mid", "motion": "slow"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    },
    {
      "frame_id": 235, "t_s": 58, "src": "t030.jpg",
      "scene": "wide_avenue_open_road", "phase": "cruise_open_road",
      "objects": [
        {"id": 203, "class": "scaffolding_overhead", "bbox": [365, 0, 568, 160], "occ": "none", "dist": "near", "motion": "stationary"},
        {"id": 212, "class": "parked_car_line_right", "bbox": [375, 170, 470, 210], "occ": "light", "dist": "mid", "motion": "stationary"},
        {"id": 216, "class": "tree_line_park_edge", "bbox": [25, 0, 365, 175], "occ": "none", "dist": "mid", "motion": "stationary"}
      ],
      "ego": {"mode": "riding", "speed_bucket": "cruise", "pedal_state": "throttle", "brake_intensity": "none", "lean_angle_deg": 0, "steering_intent": "straight", "gaze": "forward", "phone_in_hand": false, "delivery_bag_visible": false}
    }
  ],
  "captions": {
    "clip_level": [
      {"start_s": 0,  "end_s": 8,
       "en": "Rider rolls slowly along a tree-lined park-edge street, decelerating in front of a building with construction scaffolding over the sidewalk. A black BMW is in the next lane; a worker in a yellow safety vest is visible up ahead.",
       "zh": "骑手在树木夹道的公园路边缓慢前行，在一栋人行道上方搭有施工脚手架的楼前减速。隔壁车道有辆黑色 BMW，前方可见一位身穿黄色反光背心的工人。"},
      {"start_s": 8,  "end_s": 16,
       "en": "Rider pulls up to the curb at the building's revolving-door entrance and brings the scooter to a full stop under the scaffolding. Rider dismounts and retrieves the food bag from the storage compartment.",
       "zh": "骑手把车停靠到大楼旋转门入口的路缘边，在脚手架下完全停稳，下车并从储物格中取出餐袋。"},
      {"start_s": 16, "end_s": 22,
       "en": "Carrying the food bag, rider walks toward the entrance. A doorman in a white shirt and black vest emerges from the revolving door and walks out to meet the rider on the sidewalk.",
       "zh": "骑手手提餐袋走向入口。一位穿白衬衫黑马甲的门童从旋转门里走出来，迎到人行道上接餐。"},
      {"start_s": 22, "end_s": 28,
       "en": "Face-to-face handoff moment with the doorman: rider passes the food bag, the doorman receives it, brief acknowledgment, then rider walks back to the scooter and remounts.",
       "zh": "骑手与门童面对面完成交餐：骑手递出餐袋，门童接过，短暂示意后骑手转身走回电动车并重新跨上。"},
      {"start_s": 28, "end_s": 36,
       "en": "Rider pulls away from the dropoff, riding slowly under the construction scaffolding back onto the park-edge street, past a yellow-vested worker and a trash bin.",
       "zh": "骑手驶离送餐点，在施工脚手架下缓慢前行回到公园路边的街道，途中经过一位穿黄色反光衣的工人和一只垃圾桶。"},
      {"start_s": 36, "end_s": 46,
       "en": "Continuing through the residential block; approaches a marked intersection with a red light and a 'no left turn' sign. A white sedan and another yellow-vested worker are at the corner; rider yields and proceeds straight.",
       "zh": "继续穿过住宅街区，接近一个有红灯和「禁左转」标志的交叉口。路口处有一辆白色轿车和另一位反光背心工人；骑手让行并直行通过。"},
      {"start_s": 46, "end_s": 60,
       "en": "Clears the intersection onto a wider residential avenue lined with parked cars on the right and a tree-lined park edge on the left. Smooth cruise at consistent speed, light oncoming traffic.",
       "zh": "通过路口后进入一条更宽的住宅大道，右侧停车成排，左侧是树木和公园栏杆。匀速巡航，对向有少量来车。"}
    ],
    "event_level": [
      {"t_s": 4,  "type": "delivery_approach_dropoff",       "en": "Rider eases toward the destination building, slowing under construction scaffolding.", "zh": "骑手在施工脚手架下减速，向目的地大楼靠近。"},
      {"t_s": 8,  "type": "delivery_arrive_dropoff",         "en": "Scooter brought to a near-stop at the curb beside the revolving-door entrance.", "zh": "电动车在旋转门入口的路缘边几乎停稳。"},
      {"t_s": 10, "type": "delivery_full_stop_at_curb",      "en": "Full brake stop at the dropoff curb; rider holds scooter still.", "zh": "在送餐点路缘完全刹停，骑手保持电动车稳定。"},
      {"t_s": 14, "type": "delivery_dismount_retrieve_package", "en": "Rider dismounts and retrieves the food package from the bike's storage.", "zh": "骑手下车并从车辆储物格中取出餐品。"},
      {"t_s": 16, "type": "delivery_walk_to_door",           "en": "Rider walks toward the building entrance carrying the bag; shadow visible on sidewalk.", "zh": "骑手手提餐袋走向大楼入口，地面上可见自身影子。"},
      {"t_s": 18, "type": "delivery_meet_doorman",           "en": "Doorman exits the revolving door and walks toward the rider.", "zh": "门童走出旋转门，迎向骑手。"},
      {"t_s": 22, "type": "delivery_face_to_face_pre_handoff", "en": "Rider and doorman meet face-to-face at the sidewalk.", "zh": "骑手与门童在人行道上面对面相遇。"},
      {"t_s": 24, "type": "delivery_customer_handoff",       "en": "The food bag is passed from rider to doorman — the core handoff moment.", "zh": "餐袋从骑手手中交到门童手中——交餐核心瞬间。"},
      {"t_s": 26, "type": "delivery_handoff_complete_remount", "en": "Handoff complete; rider walks back and remounts the scooter.", "zh": "交餐完成，骑手转身走回电动车并重新跨上。"},
      {"t_s": 28, "type": "delivery_resume_navigation",      "en": "Rider pulls away from the dropoff back into the street.", "zh": "骑手从送餐点驶回街道。"},
      {"t_s": 42, "type": "traffic_approach_intersection",   "en": "Approach a red-light intersection with a 'no left turn' sign.", "zh": "接近一个红灯且标有「禁左转」标志的交叉口。"},
      {"t_s": 44, "type": "traffic_yield_at_intersection",   "en": "Rider yields briefly as a white sedan crosses; proceeds straight afterward.", "zh": "骑手为横穿的白色轿车短暂让行，随后继续直行。"},
      {"t_s": 46, "type": "traffic_clear_intersection_resume_cruise", "en": "Clears the intersection onto a wider avenue; smooth cruise.", "zh": "通过交叉口进入更宽的大道，恢复平稳巡航。"}
    ],
    "keyframe_level": [
      {"t_s": 0,  "en": "Riding past a black BMW on a tree-lined park-edge street; far ahead a building with scaffolding is visible.", "zh": "骑手在树木夹道的公园路边骑行，正与一辆黑色 BMW 并行，远处可见挂有脚手架的楼。"},
      {"t_s": 2,  "en": "Slowing under construction scaffolding; sidewalk is fully covered by overhead structure.", "zh": "在施工脚手架下减速，人行道完全被上方结构覆盖。"},
      {"t_s": 4,  "en": "A pedestrian in a yellow safety vest stands on the sidewalk ahead; rider continues to slow.", "zh": "前方人行道上站着一位穿黄色反光背心的行人，骑手继续减速。"},
      {"t_s": 6,  "en": "Approaching the destination's awning entrance; doorman's mat just becomes visible on the sidewalk.", "zh": "正在接近目的地的雨棚入口，人行道上已经能看见门口的迎宾地垫。"},
      {"t_s": 8,  "en": "Pulling up directly beside the building entrance; bright sun glare in the left mirror.", "zh": "电动车正紧挨大楼入口停下，左后视镜中可见强烈的阳光反射。"},
      {"t_s": 10, "en": "Stopped under the scaffolding directly in front of the revolving-door entrance.", "zh": "在脚手架下直接停在旋转门入口正前方。"},
      {"t_s": 11, "en": "Stationary at the curb; rider waits, eyes on the revolving door.", "zh": "在路缘静止不动，骑手注视着旋转门方向等待。"},
      {"t_s": 12, "en": "Still stopped; mirror reflects the revolving door — rider preparing to dismount.", "zh": "保持停车状态，后视镜映出旋转门——骑手即将下车。"},
      {"t_s": 14, "en": "Close-up of the handlebars during dismount; hand reaching down for the food bag.", "zh": "下车瞬间车把的特写，手伸向下方取餐袋。"},
      {"t_s": 15, "en": "Bag now in hand at the side of the bike; doorman silhouette starting to appear at the door.", "zh": "餐袋已抓在手中，靠在车旁；门童身影开始在门口出现。"},
      {"t_s": 16, "en": "Walking on the sidewalk toward the entrance, food bag in hand; ego's shadow stretches across the sidewalk.", "zh": "骑手手提餐袋在人行道上向入口走，身影投在地面上。"},
      {"t_s": 18, "en": "Doorman in white shirt and black vest emerges from the revolving door and walks out.", "zh": "穿白衬衫黑马甲的门童从旋转门里出来，走向骑手。"},
      {"t_s": 20, "en": "Doorman walks directly toward the rider on the sidewalk; clear visual contact.", "zh": "门童在人行道上径直走向骑手，目光交流明确。"},
      {"t_s": 21, "en": "Doorman just outside the revolving door, walking toward the rider — handoff prep.", "zh": "门童刚走出旋转门，向骑手走来——交餐准备阶段。"},
      {"t_s": 22, "en": "Doorman now face-to-face with the rider, very close — pre-handoff.", "zh": "门童与骑手面对面，距离非常近——交餐前瞬间。"},
      {"t_s": 24, "en": "Handoff moment: the food bag is passed from the rider's hand to the doorman.", "zh": "交餐瞬间：餐袋从骑手手中递到门童手中。"},
      {"t_s": 25, "en": "Mid-handoff: doorman receives the bag, brief eye contact and acknowledgment.", "zh": "交餐过程中：门童接过餐袋，短暂的眼神接触和示意。"},
      {"t_s": 26, "en": "Post-handoff: rider walks back toward the scooter, view returns to the scaffolding.", "zh": "交餐后：骑手转身走回电动车，画面回到脚手架视角。"},
      {"t_s": 27, "en": "Remounted under scaffolding; about to pull away from the dropoff.", "zh": "已在脚手架下重新跨上电动车，准备从送餐点驶离。"},
      {"t_s": 28, "en": "Rolling away from the building; tree-lined park edge appears on the left.", "zh": "从大楼旁驶离，左侧出现树木环绕的公园边缘。"},
      {"t_s": 30, "en": "Passes a worker in a yellow safety vest on the sidewalk; a green trash bin is on the curb.", "zh": "经过一位站在人行道上穿黄色反光背心的工人，路边有一只绿色垃圾桶。"},
      {"t_s": 32, "en": "Still under scaffolding; vertical posts pass on the right.", "zh": "仍在脚手架下行驶，右侧不断掠过竖向脚手架立柱。"},
      {"t_s": 34, "en": "Continuing under scaffolding; ego's shadow visible on the sidewalk to the right.", "zh": "继续在脚手架下行驶，右侧人行道上可见自身影子。"},
      {"t_s": 36, "en": "Out of the scaffolding tunnel into a sunny stretch; speed steady.", "zh": "驶出脚手架隧道进入阳光段，速度平稳。"},
      {"t_s": 38, "en": "Park-edge cruise continues; another section of scaffolding on the right.", "zh": "继续沿公园路缘巡航，右侧又出现一段脚手架。"},
      {"t_s": 40, "en": "A pedestrian appears far ahead; otherwise the park-edge block is quiet.", "zh": "前方远处出现一名行人，公园路边其余区域安静。"},
      {"t_s": 42, "en": "Approaching a marked intersection; a 'no left turn' sign and a red traffic light are visible.", "zh": "接近一个有标线的交叉口，可见「禁左转」标志和红色信号灯。"},
      {"t_s": 43, "en": "Closer to the intersection; the red light is clearer and light cross-traffic appears far ahead.", "zh": "更接近交叉口，红灯更清晰，远处可见少量横向车流。"},
      {"t_s": 44, "en": "At the intersection: a white sedan crosses ahead; a yellow-vested worker stands at the corner.", "zh": "进入交叉口：前方一辆白色轿车横穿，路口转角处有一位穿黄色反光衣的工人。"},
      {"t_s": 46, "en": "Through the intersection onto a wider avenue; parked cars line the right curb.", "zh": "通过交叉口进入一条更宽的大道，右侧路缘停车成排。"},
      {"t_s": 48, "en": "Smooth avenue cruise; silver sedan passes in the oncoming lane.", "zh": "在大道上平稳巡航，一辆银色轿车在对向车道经过。"},
      {"t_s": 50, "en": "Continuing avenue cruise; oncoming silver sedan still in the next lane.", "zh": "继续在大道上巡航，对向车道仍有银色轿车。"},
      {"t_s": 52, "en": "Silver sedan approaching directly opposite; ego holds line.", "zh": "对向银色轿车正面接近，骑手保持直线行驶。"},
      {"t_s": 54, "en": "Silver sedan now distant in the next lane; right curb still lined with parked cars.", "zh": "对向银色轿车已退至较远处，右侧路缘仍停车成排。"},
      {"t_s": 56, "en": "Passing a red sedan parked on the right; oncoming traffic now light.", "zh": "经过停在右侧的一辆红色轿车，对向车流变稀。"},
      {"t_s": 58, "en": "Open avenue ahead; another scaffolding section on the right; cruise speed maintained.", "zh": "前方开阔的大道，右侧又出现一段脚手架，速度保持巡航。"}
    ]
  }
}