Identification of network sensor locations for estimation of traffic flow

Senlai Zhu, Lin Cheng, Zhaoming Chu, Anthony Chen, Jingxu Chen

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review

9 Citations (Scopus)


This paper addresses the network sensor location prohlem (NSLP) for identifying the set of sensor locations that minimizes the variability in estimation of traffic flow given budget constraints. The trace of the covariance matrix is adopted as a measure of variability in traffic flow. On the basis of the trace of the covariance matrix in the posterior estimation of traffic flow conditional on a given set of sensor locations, the general form of the NSLP is derived. As an illustration, the multivariate normal distribution for the prior estimation of traffic flow is assumed. In this case, the actual value of the counted flows is not required. Furthermore, an incremental method that can avoid matrix inversion and give priorities of the identified sensor locations is presented to solve the NSLP. Finally, a numerical example based on the Nguyen-Dupuis network illustrates the NSLP approach and clarifies some of its implementation details.
Original languageEnglish
Title of host publicationTransportation Research Record
PublisherNational Research Council
Number of pages8
ISBN (Electronic)9780309295314
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Publication series

NameTransportation Research Record
ISSN (Print)0361-1981

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering


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