SpeedReadingInterval

Traffic density indicator on a contiguous segment of a polyline or path. Given a path with points P_0, P_1, ... , P_N (zero-based index), the SpeedReadingInterval defines an interval and describes its traffic using the following categories.

JSON representation 
{
  "startPolylinePointIndex": integer,
  "endPolylinePointIndex": integer,

  // Union field speed_type can be only one of the following:
  "speed": enum (Speed)
  // End of list of possible types for union field speed_type.
}
Fields
startPolylinePointIndex

integer

The starting index of this interval in the polyline.
endPolylinePointIndex

integer

The ending index of this interval in the polyline.

Union field speed_type.

speed_type can be only one of the following:
speed

enum (Speed)

Traffic speed in this interval.

Speed

The classification of polyline speed based on traffic data.

Enums
SPEED_UNSPECIFIED Default value. This value is unused.
NORMAL Normal speed, no slowdown is detected.
SLOW Slowdown detected, but no traffic jam formed.
TRAFFIC_JAM Traffic jam detected.