U-safety: Urban safety analysis in a smart city

Zhe Peng, Bin Xiao, Yuan Yao, Jichang Guan, Fan Yang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)


Information about urban safety, e.g., the safety index of a position, is of great importance to protect humans and support safe walking route planning. Despite some research on urban safety analysis, the accuracy and granularity of safety index inference are both very limited. The problem of analyzing urban safety to predict safety index throughout a city has not been sufficiently studied and remains open. In this paper, we propose U-Safety, an urban safety analysis system to infer safety index by leveraging multiple cross-domain urban data. We first extract spatially-related and temporally-related features from various urban data, including urban map, housing rent and density, population, positions of police stations, point of interests (POIs), crime event records, and taxi GPS trajectories. Then, these features are feeded into a sparse auto-encoder (SAE) model to obtain the final discriminative feature representation. Finally, we design a new co-training-based learning method, which consists of two separated classifiers, to calculate safety index accurately. We implement U-Safety and conduct extensive experiments based on real data sources obtained in New York City. The evaluation results demonstrate the advantages of U-Safety over other methods.
Original languageEnglish
Title of host publication2017 IEEE International Conference on Communications, ICC 2017
ISBN (Electronic)9781467389990
Publication statusPublished - 28 Jul 2017
Event2017 IEEE International Conference on Communications, ICC 2017 - Paris, France
Duration: 21 May 201725 May 2017


Conference2017 IEEE International Conference on Communications, ICC 2017


  • city dynamics
  • human mobility
  • Safety index
  • spatial trajectories

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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