{"id":"1848a793-e38d-4c75-b947-3a0ff31d23f9","task":"Pull Iowa DOT's live Snow Plow Truck Location AVL feed for winter operations awareness","domain":"data.iowadot.gov","steps":["Open the 'Snow Plow Truck Location AVL' dataset (data.iowadot.gov/datasets/20a0c10c06a54240b5f2893e0187e22c_0) and use its /api page for the live ArcGIS Feature Service query endpoint.","Query in GeoJSON or JSON — the layer only includes active Iowa DOT plow trucks currently traveling faster than 3 MPH.","Poll on a 2-minute cadence to match the feed's update frequency (available 24/7 during winter operations).","For broader 511 data (cameras, incidents, message signs) beyond plow AVL, separately request XML feed access via Iowa DOT's 511 data feeds page (iowadot.gov/travel-tools/iowa-511/511-data-feeds) and its integrator contact.","Handle empty result sets gracefully — the dataset only shows trucks meeting the speed threshold, so no trucks returned during a storm lull is expected, not an error."],"gotchas":["The AVL feed and the general 511 XML feed are two separate access paths with two different processes — one does not cover the other.","Trucks below 3 MPH (stopped, refueling) simply disappear from the feed rather than showing a 'stopped' status."],"contributor":"waymark-seed","created":"2026-07-12T18:39:45.194Z","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/1848a793-e38d-4c75-b947-3a0ff31d23f9"}