Annual Free-Flow Speeds per Network Link


The free-flow speed table contains information about annual average free-flow speeds per network link. Free-flow speed is defined as the 66th percentile speed during off-peak hours, meaning that 66% of vehicles are traveling at or below this speed on a given road segment during non-busy times. This data is available for 2021 and 2022, and is updated annually. It is available for download in shapefile, geojson, and CSV format in the Replica application.

See what coverage we have in specific areas here.

FRCFree-flow Speed % Coverage in 2022 data
* Percentage of segments with a free-flow speed value

Sample Download

Click here to download a sample of Replica's free-flow speed per network link table.


Field nameContent typeSample valueDescription
idString7699009_1A unique identifier for each road segment.
osm_idString5149900OSM Way ID (version 2021-09-01 for the 2021 data; version 2022-12-01 for the 2022 data)
forwardBooleanTRUEOrientation of speed relative to OSM way (True: parallel, False: antiparallel).
free_flow_speed_mphInteger44Free flow speed for the network link in miles per hour.
street_nameStringScenic AvenueThe common name of the network link if available. Matches the name assigned by OpenStreetMap.
geometryGeographyLINESTRING(-122.279327301964 37.8109962748959, -122.279142155032 37.8109143185075, -122.279041013398 37.8108588116808)The geometry of the network link.
latFloat37.8109315588127Latitude of the point on the network link nearest to its centroid.
lngFloat-122.27918110236033Longitude of the point on the network link nearest to its centroid.
lengthFloat29.46The length of the network link in meters.
headingInteger121The heading of the network link.
highwayStringsecondary_linkThe classification of the link based on OpenStreetMap data if available.

Quality Metrics and Methodology

Read about the Quality Metrics and Methodology on the overview page for Replica's Annual Speeds Data