{
  "catalog_id": 13,
  "title": "Phone distraction and an unexpected stop",
  "source_template": "police",
  "summary": "A phone-distracted pedestrian drifts into the lane, stops, changes direction and eventually returns to the sidewalk.",
  "focus_xy": [
    34.8,
    -1
  ],
  "initial_review_time_s": 0,
  "ego_stop_x_m": 12,
  "ego_release_s": 15,
  "events": [
    {
      "time_s": -7,
      "label": "A pedestrian walks east along the south sidewalk while looking down at a phone."
    },
    {
      "time_s": -4,
      "label": "Still reading, the pedestrian begins drifting toward the roadway."
    },
    {
      "time_s": -2,
      "label": "The pedestrian enters the roadway without looking toward ego."
    },
    {
      "time_s": 0,
      "label": "An unexpected bounded stop occurs inside the ego corridor."
    },
    {
      "time_s": 4,
      "label": "After a planted turn, the pedestrian changes course westward while still reading."
    },
    {
      "time_s": 6,
      "label": "The pedestrian stops a second time, now farther upstream in the lane."
    },
    {
      "time_s": 8,
      "label": "The pedestrian looks up and begins returning to the south sidewalk."
    },
    {
      "time_s": 15,
      "label": "Following sidewalk arrival at 13 s and a two-second clearance check, ego may resume."
    },
    {
      "time_s": 40,
      "label": "The pedestrian remains on the sidewalk with the same phone still held."
    }
  ],
  "actors": [
    {
      "id": "c013_reader",
      "label": "Phone-focused pedestrian",
      "kind": "human",
      "role": "Adult with head lowered toward a handheld phone and initially limited traffic awareness",
      "color": "navy",
      "length_m": 0.52,
      "width_m": 0.48,
      "height_m": 1.73,
      "keys": [
        {
          "t": -7,
          "x": 29.6,
          "y": -5.2,
          "z": 0,
          "heading_deg": 0,
          "pose": "phone"
        },
        {
          "t": -4,
          "x": 33.2,
          "y": -5.2,
          "z": 0,
          "heading_deg": 0,
          "pose": "phone"
        },
        {
          "t": -2,
          "x": 34.8,
          "y": -3.4,
          "z": 0,
          "heading_deg": 90,
          "pose": "phone"
        },
        {
          "t": 0,
          "x": 34.8,
          "y": -1,
          "z": 0,
          "heading_deg": 90,
          "pose": "phone"
        },
        {
          "t": 2,
          "x": 34.8,
          "y": -1,
          "z": 0,
          "heading_deg": 90,
          "pose": "phone"
        },
        {
          "t": 4,
          "x": 34.8,
          "y": -1,
          "z": 0,
          "heading_deg": 180,
          "pose": "phone"
        },
        {
          "t": 6,
          "x": 32.6,
          "y": -1,
          "z": 0,
          "heading_deg": 180,
          "pose": "phone"
        },
        {
          "t": 8,
          "x": 32.6,
          "y": -1,
          "z": 0,
          "heading_deg": 270,
          "pose": "walk"
        },
        {
          "t": 13,
          "x": 32.6,
          "y": -5.5,
          "z": 0,
          "heading_deg": 270,
          "pose": "stand"
        },
        {
          "t": 40,
          "x": 32.6,
          "y": -5.5,
          "z": 0,
          "heading_deg": 270,
          "pose": "stand"
        }
      ],
      "attach_to": "",
      "attach_start_s": -7,
      "attach_end_s": 40,
      "attach_offset_xyz": [
        0,
        0,
        0
      ],
      "interaction": "Keeps gaze down and both hands ahead around the phone while walking. The -4..-2 s path is a smooth east-to-north curve whose heading follows its tangent. Decelerates to the first stop by 0 s, turns west while planted during 2..4 s, then walks upstream and stops again at 6 s. Raises the head and turns south during 6..8 s before returning to the sidewalk; the phone is retained, not deleted or pocketed."
    },
    {
      "id": "c013_phone",
      "label": "Handheld smartphone",
      "kind": "equipment",
      "role": "Persistent upright phone being read by the distracted pedestrian",
      "color": "charcoal",
      "length_m": 0.015,
      "width_m": 0.075,
      "height_m": 0.15,
      "keys": [
        {
          "t": -7,
          "x": 29.98,
          "y": -5.2,
          "z": 1.084047,
          "heading_deg": 0,
          "pose": "carry"
        },
        {
          "t": -4,
          "x": 33.58,
          "y": -5.2,
          "z": 1.084047,
          "heading_deg": 0,
          "pose": "carry"
        },
        {
          "t": -2,
          "x": 34.8,
          "y": -3.02,
          "z": 1.08144,
          "heading_deg": 90,
          "pose": "carry"
        },
        {
          "t": 0,
          "x": 34.8,
          "y": -0.62,
          "z": 1.08144,
          "heading_deg": 90,
          "pose": "carry"
        },
        {
          "t": 2,
          "x": 34.8,
          "y": -0.62,
          "z": 1.08144,
          "heading_deg": 90,
          "pose": "carry"
        },
        {
          "t": 4,
          "x": 34.42,
          "y": -1,
          "z": 1.075953,
          "heading_deg": 180,
          "pose": "carry"
        },
        {
          "t": 6,
          "x": 32.22,
          "y": -1,
          "z": 1.075953,
          "heading_deg": 180,
          "pose": "carry"
        },
        {
          "t": 8,
          "x": 32.6,
          "y": -1.38,
          "z": 1.07856,
          "heading_deg": 270,
          "pose": "carry"
        },
        {
          "t": 13,
          "x": 32.6,
          "y": -5.88,
          "z": 1.07856,
          "heading_deg": 270,
          "pose": "carry"
        },
        {
          "t": 40,
          "x": 32.6,
          "y": -5.88,
          "z": 1.07856,
          "heading_deg": 270,
          "pose": "carry"
        }
      ],
      "attach_to": "c013_reader",
      "attach_start_s": -7,
      "attach_end_s": 40,
      "attach_offset_xyz": [
        0.38,
        0,
        1.08
      ],
      "interaction": "Held upright with the screen facing the pedestrian and fingers contacting the narrow side edges. Follows the host through walking and planted turns. After the pedestrian looks up, it remains held below the line of sight at the same attachment offset."
    }
  ],
  "acceptance_checks": [
    "Verify one persistent adult and one persistent phone, with no second pedestrian or replacement phone.",
    "Evaluate 941 samples at 20 Hz; use a tangent-aligned curved approach, planted turns and walking speeds of 0.6..1.7 m/s apart from bounded starting and stopping transitions.",
    "Make the lowered gaze, first lane stop, westward direction change and second stop clearly distinguishable from an ordinary crossing.",
    "Check the phone remains gripped, its attachment transforms agree with its keys, and neither phone nor hands intersect the torso.",
    "Keep ego at x=12, y=0 until the pedestrian and phone are on the south sidewalk at 13 s and clearance remains confirmed through 15 s.",
    "Require human review of the full timeline and original parked-vehicle occlusions before Image 2.5 edits original Image 2."
  ],
  "assumptions": [
    "The pedestrian, distraction and motion are newly authored counterfactuals. Original Image 2 supports the brick streetscape, overhead connection and parked vehicles, not the proposed behavior.",
    "The police template is used only for its map and source photograph. No police encounter is imported into this scene.",
    "The south sidewalk path stays near y=-5.2; the lane pauses occur at y=-1. The return ends within the mapped south sidewalk at x=32.6, y=-5.5.",
    "Playback is finite and non-looping at 20 Hz from -7 through 40 s. Unexpected stopping means bounded deceleration, not a velocity discontinuity; use C1 interpolation with explicit stationary intervals.",
    "The supplied ground plane supports the human at z=0. Phone key heights compensate the plane gradient for the permanent local attachment offset.",
    "Ego is the simulator vehicle, approximately 4.6 by 1.85 m, stopped with its center at x=12, y=0 by -3 s. The nominal 15 s release is conditional on full buffered-corridor clearance.",
    "Exact curb geometry, photographed vehicle depths and pedestrian mental state are not established by the image. The proposal awaits human approval; its acceptance checks have not been executed."
  ]
}