What: FDOT’s ArcGIS open data portal — downloadable shapefiles/GeoJSON and live REST feature services for AADT, Roadway Characteristics Inventory (RCI), functional classification, crashes, bridges, context classification, and much more. Why: the standard free source for mapping any Florida corridor study; every study figure starts here. When: building base maps, corridor inventory before a field review, joining AADT or functional class to your own layers.
No login. Gotchas: read the layer metadata before trusting it — vintage and coverage vary, and RCI-derived layers describe the State Highway System only (field-verify anything older than the current cycle). City/county assets live on the local GeoHubs, not here.
Tip
You rarely need to download: paste the layer’s REST service URL straight into QGIS/ArcGIS and it stays current. Workflow notes in GIS and Google Earth.
See also: GIS and Google Earth · Florida Geographic Data Library (FGDL) · Florida Geospatial Open Data Portal (Florida GIO)