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HPMS Traffic Data Review

HPMS Traffic Data Review. Highway Information Seminar Oct 22 - 25, 2012 Patrick Zhang, P.E. 202-366-1941 Office of Highway Information Policy, FHWA. Review Objective. The HPMS traffic data review is to ensure quality and consistent data from all State highway agencies.

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HPMS Traffic Data Review

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  1. HPMS Traffic Data Review Highway Information Seminar Oct 22 - 25, 2012 Patrick Zhang, P.E. 202-366-1941 Office of Highway Information Policy, FHWA

  2. Review Objective The HPMS traffic data review is to ensure quality and consistent data from all State highway agencies.

  3. Key Processes Currently Used • Roadway link/segment level traffic data – GIS tools • Statewide summary level – Database and Trend

  4. State Level VMT Data Vehicle Miles Travelled by Roadway Types Data Sources 1: HPMS Statewide Summaries – daily VMT for rural minor collectors, rural locals, and small urban locals 2: HPMS Urban Area Summaries – urban local daily VMT 3: All Others – AADT x length of roadway segment - Full Extent Data State total = 1 + 2 + 3

  5. Example - State VMT

  6. Example - Compare to the last year

  7. Example - VMT changes by roadway types

  8. Example – State VMT Historical Trends by Roadway types

  9. VMT by Vehicle Types • 6 Vehicle Types Motorcycle, Passenger Car, Light Truck, Bus, Single Unit Truck, Combination Truck • 6 Roadway Types 3 Rural Roadway Types, 3 Urban Roadway Types • Roadway Type Merges VM-1 Roadway Types VM-2 Roadway Types Interstate  (1) Interstate Other Arterial  (2) PA - Other Freeways + (3) PA – Other+ (4) Minor Arterial Other Urban (rural)  (5) Major Collector + (6) Minor Collector+ (7) Local

  10. Example – State Vehicle Summary Data

  11. Calculate VMT by Vehicle Types & Roadway Types VMT by vehicle types = % by vehicle type x VMT by road types Example:

  12. Example – Percentage of Single Unit Truck showing dramatic changes

  13. Example – Single Unit Truck VMT

  14. Box Plot for 6 Vehicle Types State X

  15. Example – dramatic changes

  16. Example – Unusual High /Low

  17. Example – 1. decimal issues 2. other urban bus % = 0%

  18. Example – lower class roads have more Combination Truck

  19. Example – Lower class roads have more Combination Truck

  20. Questions? Patrick Zhang patrick.zhang@dot.gov 202-366-1941

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