HERE Data Validation

Details

• Creators:
  Chamberlin, Robert ; Haghighi, Nima ; Fayyaz, Kiavash
• Corporate Creators:
  Resource System Group
• Corporate Contributors:
  Utah. Dept. of Transportation. Research Division ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Application Programming Interfaces Estimating Global Positioning System Google Directions API HERE Technologies [company] Navigation Devices Passive Data Travel Time Travel Time Estimation
• Publication/ Report Number:
  UT- 19.25
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah ; United States
• Edition:
  Final Report Feb 2013 to Feb 2015
• Corporate Publisher:
  Utah. Dept. of Transportation. Research Division
• Abstract:
  UDOT has purchased a contract from HERE for providing travel-time information for Utah highways. HERE travel-time estimates are primarily derived from GPS data obtained from in-vehicle navigation devices. In this research, UDOT is interested in learning how the travel-time estimates from HERE compare to another source of travel-time data, obtained from the Google Directions Application Program Interface (API). The source of this travel-time information is from users of Google Maps directions who, by virtue of using the direction service, agree to provide Google with their geographic position. Google aggregates this data to produce travel-time estimates for highway segments. Both sources of travel-time information utilize an algorithm for estimating travel times that is partially based on real-time data and partially based on other factors that are not publicized by either service. The research analyzed 59 highway segments and compared travel-time estimates from January 21 to February 25, 2019. The research finds that, under normal operations, travel times from HERE and Google are very comparable. The research focused on specific highway segments and times when a crash was reported on I-15. A total of 113 crash incidents were analyzed to determine how travel times from the two services differed under the potentially congested conditions occurring during the clearance or resolution of a crash incident. In 71% of these cases, travel times from Google were significantly lower than those reported from HERE.
• Format:
  PDF
• Funding:
  19-8240
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a2600209c3a9d11e8104d285924bd828cba60b3b6bbcd0d30833ccfb2960b5f6
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/61720/dot_61720_DS1.pdf
• File Type:
  [PDF - 3.83 MB ]