City of Portland, OregonPolygons representing traffic islands and circles in the City of Portland. This dataset contains seven island types (IslandType): - channelization island (3310), - median barrier (3320), - median island (3330), - pedestrian refuge island (3340), - traffic circle (3350), - truck trap (3360), - traffic separator (3370). -- Additional Information: Category: Transportation - Assets Purpose: Inventory of traffic islands in Portland. Update Frequency: As needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52786ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/939a46ac63ec4ea4ab130bcd0655f03d_218engPortlandMaps Open DataPublicTraffic Islands and Circles [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2026-01-08