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    • Intelligent Network Flow Optimization Prototype Traffic Management Entity-Based Speed Harmonization

    Metadata Updated: January 20, 2026

    Data is from the small-scale demonstration of the Intelligent Network Flow Optimization (INFLO) Prototype System and applications in Seattle, Washington. Connected vehicle systems were deployed in 21 vehicles in a scripted driving scenario circuiting this I-5 corridor northbound and southbound during morning rush hour. This data set contains speed harmonization messages that were recommended by the INFLO SPD-HARM algorithm and sent by the traffic management center to the connected vehicles, which provided drivers with the suggested speed while driving on the segment of I-5 that was included in the test. The objective of speed harmonization is to dynamically adjust and coordinate maximum appropriate vehicle speeds in response to downstream congestion, incidents, and weather or road conditions in order to maximize traffic throughput and reduce crashes.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date January 20, 2026
    Data Update Frequency irregular

    Metadata Source

    Harvested from DOT Socrata Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date January 20, 2026
    Publisher US Department of Transportation
    Maintainer
    Identifier https://data.transportation.gov/api/views/ij7i-psm5
    Data First Published 2016-02-17
    Language en-US
    Data Last Modified 2016-02-17
    Category Automobiles
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 021:15
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.transportation.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Data Quality True
    Harvest Object Id 3984cb42-9e60-4162-8850-71f924a44e08
    Harvest Source Id a776e4b7-8221-443c-85ed-c5ee5db0c360
    Harvest Source Title DOT Socrata Data.json
    Homepage URL https://data.transportation.gov/d/ij7i-psm5
    License http://creativecommons.org/licenses/by-sa/3.0/legalcode
    Old Spatial Seattle, Washington
    Program Code 021:013
    Source Datajson Identifier True
    Source Hash e9008bf46e89f60cdea31a7a751b9725c8608e857a13e23a4c5b443596c05f02
    Source Schema Version 1.1
    Spatial
    Temporal 2015-01-12/2015-01-16

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