{
  "width": 1000,
  "height": 2000,
  "dt": 0.2,
  "entities": [
    {
      "id": "ego",
      "type": "ego",
      "toward": "0",
      "x": 500,
      "y": 0,
      "size": "Small",
      "vx": 0,
      "vy": 416,
      "ay": 0,
      "accel_mode": "Z"
    },
    {
      "id": "veh_1",
      "type": "vehicle",
      "toward": "0",
      "x": 163,
      "y": 1445,
      "size": "Small",
      "vx": 0,
      "vy": -416,
      "ay": 0,
      "accel_mode": "Z"
    },
    {
      "id": "veh_2",
      "type": "vehicle",
      "toward": "1",
      "x": 867,
      "y": 1420,
      "size": "Small",
      "vx": 0,
      "vy": 0,
      "ay": 0,
      "accel_mode": "Z"
    },
    {
      "id": "obs_1",
      "type": "obstacle",
      "x": 798,
      "y": 645,
      "width": 400,
      "length": 1300
    }
  ]
}