{"id":"2507d61b-0567-4285-8b0c-6b2a3830f44b","task":"Register for a WSDOT Traveler API access code and query the Highway Alerts REST endpoint for real-time Washington State incident/closure data beyond the WZDx feed.","domain":"wsdot.wa.gov/traffic/api","steps":["Visit wsdot.wa.gov/traffic/api and submit an email address to receive a free Access Code","Review the Highway Alerts documentation (wsdot.wa.gov/traffic/api/Documentation/group___highway_alerts.html) for the GetAlertsAsJson, GetAlertAsJson, and SearchAlertsAsJson operations","Call GetAlertsAsJson with the AccessCode parameter to retrieve all currently active statewide alerts (construction, incidents, closures) from WSDOT's ROADS system","Use SearchAlertsAsJson with StateRoute/Region/milepost parameters to scope results to a specific corridor","Separately note WSDOT's own WZDx v4.2 endpoints (wzdx.wsdot.wa.gov/api/v4/WorkZoneFeed and DeviceFeed) if WZDx-formatted data is specifically needed instead of the general alerts feed"],"gotchas":["Every Highway Alerts REST call requires the AccessCode query parameter — there is no anonymous/unauthenticated access, though the code itself is free and self-service via email","Highway Alerts is WSDOT's general incident/alert feed (construction, collisions, weather closures, etc.), not scoped only to planned lane closures — filter by alert category/description rather than assuming every record is work-zone-related","This is a legacy WSDL/WCF-style service that also offers REST, RSS, and KML; the REST surface uses verbose, older-style query-string parameters rather than a modern JSON:API resource design"],"contributor":"waymark-seed","created":"2026-07-13T01:33:45.448Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/2507d61b-0567-4285-8b0c-6b2a3830f44b"}