20210304 07451600 1.0 TRUE Traffic Islands and Circles Polygons 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=52786 Bureau of Transportation