Understanding travel time uncertainty impacts on individual accessibility

Biyu Chen; Yafei Wang; Donggen Wang; William H.K. Lam; Hui Ping Chen

Understanding travel time uncertainty impacts on individual accessibility

Biyu Chen
, Yafei Wang
, Donggen Wang
, William H.K. Lam
, Hui Ping Chen

Research output: Chapter in book/report/conference proceeding › Conference proceeding › peer-review

Abstract

Most existing individual accessibility studies ignore travel time uncertainties commonly encountered in congested road networks. This study investigates the impacts of travel time uncertainties on the equity of individual accessibility using spatiotemporal big data collected in Shenzhen, China. The collected big data are utilized to extract travel time distribution information and mobility data of a large number of individual samples across the entire study area. Two reliability-based individual accessibility measures are proposed to evaluate individual accessibility by explicitly considering the individual's reliability constraint in the activity-travel scheduling. The proposed measures are further applied to quantify the travel time uncertainty impacts on individual accessibility to healthy food retailers in Shenzhen. Results of this study suggest that travel time uncertainties have distinct impacts of travel time uncertainties on accessibility of different people groups; and underscore that traditional accessibility measures ignoring travel time uncertainties can lead to significant bias on the evaluation of individual accessibility and associated equity issues.

Original language	English
Title of host publication	Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018
Editors	Weihua Gu, Shuaian Wang
Publisher	Hong Kong Society for Transportation Studies Limited
Pages	337-344
Number of pages	8
ISBN (Electronic)	9789881581471
Publication status	Published - 8 Dec 2018
Event	23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018 - Hong Kong, Hong Kong, China Duration: 8 Dec 2018 → 10 Dec 2018

Publication series

Name	Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018

Conference

Conference	23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018
Country/Territory	Hong Kong, China
City	Hong Kong
Period	8/12/18 → 10/12/18

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 10 Reduced Inequalities

User-Defined Keywords

Accessibility Equity
Individual Accessibility
Social Exclusion
Spatiotemporal Big Data
Travel Time Uncertainty

Cite this

Chen, B., Wang, Y., Wang, D., Lam, W. H. K., & Chen, H. P. (2018). Understanding travel time uncertainty impacts on individual accessibility. In W. Gu, & S. Wang (Eds.), Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018 (pp. 337-344). (Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018). Hong Kong Society for Transportation Studies Limited.

Chen, Biyu ; Wang, Yafei ; Wang, Donggen et al. / Understanding travel time uncertainty impacts on individual accessibility. Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018. editor / Weihua Gu ; Shuaian Wang. Hong Kong Society for Transportation Studies Limited, 2018. pp. 337-344 (Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018).

@inproceedings{2e984634263b468780595df6fb07902d,

title = "Understanding travel time uncertainty impacts on individual accessibility",

abstract = "Most existing individual accessibility studies ignore travel time uncertainties commonly encountered in congested road networks. This study investigates the impacts of travel time uncertainties on the equity of individual accessibility using spatiotemporal big data collected in Shenzhen, China. The collected big data are utilized to extract travel time distribution information and mobility data of a large number of individual samples across the entire study area. Two reliability-based individual accessibility measures are proposed to evaluate individual accessibility by explicitly considering the individual's reliability constraint in the activity-travel scheduling. The proposed measures are further applied to quantify the travel time uncertainty impacts on individual accessibility to healthy food retailers in Shenzhen. Results of this study suggest that travel time uncertainties have distinct impacts of travel time uncertainties on accessibility of different people groups; and underscore that traditional accessibility measures ignoring travel time uncertainties can lead to significant bias on the evaluation of individual accessibility and associated equity issues.",

keywords = "Accessibility Equity, Individual Accessibility, Social Exclusion, Spatiotemporal Big Data, Travel Time Uncertainty",

author = "Biyu Chen and Yafei Wang and Donggen Wang and Lam, \{William H.K.\} and Chen, \{Hui Ping\}",

note = "Funding Information: The work described in this paper was supported by research grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (No. PolyU 152095/17E).; 23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018 ; Conference date: 08-12-2018 Through 10-12-2018",

year = "2018",

month = dec,

day = "8",

language = "English",

series = "Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018",

publisher = "Hong Kong Society for Transportation Studies Limited",

pages = "337--344",

editor = "Weihua Gu and Shuaian Wang",

booktitle = "Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018",

}

Chen, B, Wang, Y, Wang, D, Lam, WHK & Chen, HP 2018, Understanding travel time uncertainty impacts on individual accessibility. in W Gu & S Wang (eds), Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018. Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018, Hong Kong Society for Transportation Studies Limited, pp. 337-344, 23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018, Hong Kong, Hong Kong, China, 8/12/18.

Understanding travel time uncertainty impacts on individual accessibility. / Chen, Biyu; Wang, Yafei; Wang, Donggen et al.
Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018. ed. / Weihua Gu; Shuaian Wang. Hong Kong Society for Transportation Studies Limited, 2018. p. 337-344 (Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018).

Research output: Chapter in book/report/conference proceeding › Conference proceeding › peer-review

TY - GEN

T1 - Understanding travel time uncertainty impacts on individual accessibility

AU - Chen, Biyu

AU - Wang, Yafei

AU - Wang, Donggen

AU - Lam, William H.K.

AU - Chen, Hui Ping

N1 - Funding Information: The work described in this paper was supported by research grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (No. PolyU 152095/17E).

PY - 2018/12/8

Y1 - 2018/12/8

N2 - Most existing individual accessibility studies ignore travel time uncertainties commonly encountered in congested road networks. This study investigates the impacts of travel time uncertainties on the equity of individual accessibility using spatiotemporal big data collected in Shenzhen, China. The collected big data are utilized to extract travel time distribution information and mobility data of a large number of individual samples across the entire study area. Two reliability-based individual accessibility measures are proposed to evaluate individual accessibility by explicitly considering the individual's reliability constraint in the activity-travel scheduling. The proposed measures are further applied to quantify the travel time uncertainty impacts on individual accessibility to healthy food retailers in Shenzhen. Results of this study suggest that travel time uncertainties have distinct impacts of travel time uncertainties on accessibility of different people groups; and underscore that traditional accessibility measures ignoring travel time uncertainties can lead to significant bias on the evaluation of individual accessibility and associated equity issues.

AB - Most existing individual accessibility studies ignore travel time uncertainties commonly encountered in congested road networks. This study investigates the impacts of travel time uncertainties on the equity of individual accessibility using spatiotemporal big data collected in Shenzhen, China. The collected big data are utilized to extract travel time distribution information and mobility data of a large number of individual samples across the entire study area. Two reliability-based individual accessibility measures are proposed to evaluate individual accessibility by explicitly considering the individual's reliability constraint in the activity-travel scheduling. The proposed measures are further applied to quantify the travel time uncertainty impacts on individual accessibility to healthy food retailers in Shenzhen. Results of this study suggest that travel time uncertainties have distinct impacts of travel time uncertainties on accessibility of different people groups; and underscore that traditional accessibility measures ignoring travel time uncertainties can lead to significant bias on the evaluation of individual accessibility and associated equity issues.

KW - Accessibility Equity

KW - Individual Accessibility

KW - Social Exclusion

KW - Spatiotemporal Big Data

KW - Travel Time Uncertainty

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M3 - Conference proceeding

AN - SCOPUS:85064604015

T3 - Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018

SP - 337

EP - 344

BT - Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018

A2 - Gu, Weihua

A2 - Wang, Shuaian

PB - Hong Kong Society for Transportation Studies Limited

T2 - 23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018

Y2 - 8 December 2018 through 10 December 2018

ER -

Chen B, Wang Y, Wang D, Lam WHK, Chen HP. Understanding travel time uncertainty impacts on individual accessibility. In Gu W, Wang S, editors, Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018. Hong Kong Society for Transportation Studies Limited. 2018. p. 337-344. (Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018).

Understanding travel time uncertainty impacts on individual accessibility

Abstract

Publication series

Conference

UN SDGs

User-Defined Keywords

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Cite this