Measuring control delay components using second-by-second GPS speed data

Joonho Ko, Michael Hunter, Randall Guensler

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

High-resolution vehicle speed profiles obtained from sophisticated devices such as global positioning system (GPS) receivers provide an opportunity to accurately measure intersection delay, composed of deceleration delay, stopped delay, and acceleration delay. Although the delay components can be measured by manually examining the speed profiles or derived time-space diagrams, identifying when vehicles begin to decelerate or stop accelerating is not always a straightforward task. In addition, a manual identification process may be laborious and time consuming when handling a large network or numerous runs. More importantly, the results from a manual process may not be consistent between analysts or even for a single analyst over time. This paper proposes a new approach to identifying control delay components based on second-by-second vehicle speed profiles obtained from GPS devices. The proposed approach utilizes both denoised speed and acceleration profiles for capturing critical points associated with each delay component. Speed profiles are used for the identification of stopped time periods, and acceleration profiles are used for detecting deceleration onset points and acceleration ending points. The writers applied this methodology to sampled runs collected from GPS-equipped instrumented vehicles and concluded that it satisfactorily computed delay components under normal traffic conditions and for the intersections not affected by adjacent intersections.

Original languageEnglish
Pages (from-to)338-346
Number of pages9
JournalJournal of Transportation Engineering
Volume134
Issue number8
DOIs
StatePublished - 2008 Aug 1

Fingerprint

Global positioning system
Deceleration
recipient
writer
traffic
time
methodology

Keywords

  • Global positioning
  • Intersections
  • Measurement
  • Traffic delay
  • Traffic signals

Cite this

Ko, Joonho ; Hunter, Michael ; Guensler, Randall. / Measuring control delay components using second-by-second GPS speed data. In: Journal of Transportation Engineering. 2008 ; Vol. 134, No. 8. pp. 338-346.
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Measuring control delay components using second-by-second GPS speed data. / Ko, Joonho; Hunter, Michael; Guensler, Randall.

In: Journal of Transportation Engineering, Vol. 134, No. 8, 01.08.2008, p. 338-346.

Research output: Contribution to journalArticle

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