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), theSpeedReadingIntervaldefines an interval and describes its traffic using the following categories.
JSON representation
{"startPolylinePointIndex":integer,"endPolylinePointIndex":integer,// Union fieldspeed_typecan be only one of the following:"speed":enum (Speed)// End of list of possible types for union fieldspeed_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 fieldspeed_type. The type of speed in this interval.speed_typecan be only one of the following:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-27 UTC."],[[["\u003cp\u003e\u003ccode\u003eSpeedReadingInterval\u003c/code\u003e indicates traffic density on a path segment using start and end points.\u003c/p\u003e\n"],["\u003cp\u003eIt classifies traffic speed into categories: \u003ccode\u003eNORMAL\u003c/code\u003e, \u003ccode\u003eSLOW\u003c/code\u003e, and \u003ccode\u003eTRAFFIC_JAM\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe interval is represented in JSON format including start/end point indexes and speed information.\u003c/p\u003e\n"]]],[],null,["# SpeedReadingInterval\n\n- [JSON representation](#SCHEMA_REPRESENTATION)\n- [Speed](#Speed)\n\nTraffic 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.\n\n| JSON representation |\n|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"startPolylinePointIndex\": integer, \"endPolylinePointIndex\": integer, // Union field `speed_type` can be only one of the following: \"speed\": enum (/maps/documentation/routes/reference/rest/v2/SpeedReadingInterval#Speed) // End of list of possible types for union field `speed_type`. } ``` |\n\n| Fields ||\n|---------------------------|-----------------------------------------------------------------------------------------------------------------------------|\n| `startPolylinePointIndex` | `integer` The starting index of this interval in the polyline. |\n| `endPolylinePointIndex` | `integer` The ending index of this interval in the polyline. |\n| Union field `speed_type`. The type of speed in this interval. `speed_type` can be only one of the following: ||\n| `speed` | `enum (`[Speed](/maps/documentation/routes/reference/rest/v2/SpeedReadingInterval#Speed)`)` Traffic speed in this interval. |\n\nSpeed\n-----\n\nThe classification of polyline speed based on traffic data.\n\n| Enums ||\n|---------------------|----------------------------------------------|\n| `SPEED_UNSPECIFIED` | Default value. This value is unused. |\n| `NORMAL` | Normal speed, no traffic delays. |\n| `SLOW` | Slowdown detected, medium amount of traffic. |\n| `TRAFFIC_JAM` | Traffic delays. |"]]
