routeBBox 
  Specifies a geographical box surrounding a route. Used to zoom into a route when displaying it in a map. For example, [min x, min y, max x, max y].
The first 2 bbox parameters describe the lower southwest corner:
- The first - bboxposition is the X coordinate or longitude of the lower southwest corner.
- The second - bboxposition is the Y coordinate or latitude of the lower southwest corner.
The next 2 bbox parameters describe the upper northeast corner:
- The third - bboxposition is the X coordinate, or longitude of the upper northeast corner.
- The fourth - bboxposition is the Y coordinate, or latitude of the upper northeast corner.