Wsdot Traffic Flow API (1.0.0)

Download OpenAPI specification:

Wsdot Traffic Flow API - Washington State Department of Transportation APIs

flow-data

Real-time traffic flow conditions from sensor stations across Washington state.

List current traffic flow conditions for all stations statewide.

Responses

Request samples

JavaScript

import { fetchTrafficFlows } from 'ws-dottie/wsdot-traffic-flow/core';

const data = await fetchTrafficFlows({
  fetchMode: 'native',
  validate: true
});

console.log(data);

Response samples

200

Content type

application/json

Example of a successful response from the API (showing first item of 1462 total)

[{"FlowDataID": 2482,
"FlowReadingValue": 1,
"FlowStationLocation": {"Description": "Homeacres Rd",
"Direction": "EB",
"Latitude": 47.978415632,
"Longitude": -122.174701738,
"MilePost": 0.68,
"RoadName": "002"
},
"Region": "Northwest",
"StationName": "002es00068",
"Time": "2025-11-15T17:43:22.000Z"
}
]

Get current traffic flow condition for a specific station by ID.

Responses

Request samples

JavaScript

import { fetchTrafficFlowById } from 'ws-dottie/wsdot-traffic-flow/core';

const data = await fetchTrafficFlowById({
  params: {
    "FlowDataID": 2482
  },
  fetchMode: 'native',
  validate: true
});

console.log(data);

Response samples

200

Content type

application/json

Example of a successful response from the API

{"FlowDataID": 2482,
"FlowReadingValue": 1,
"FlowStationLocation": {"Description": "Homeacres Rd",
"Direction": "EB",
"Latitude": 47.978415632,
"Longitude": -122.174701738,
"MilePost": 0.68,
"RoadName": "002"
},
"Region": "Northwest",
"StationName": "002es00068",
"Time": "2025-11-15T17:43:22.000Z"
}