An optimization model for bus route redesign considering accessibility improvement for seniors

Yuan Chen, Xianfei Yin, Ahmed Bouferguene, Mohamed Al-Hussein, Yinghua Shen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


Bus transit acts as a significant catalyst in the process of sustainable and resilient urbanization. However, within any given urban agglomeration, residents do not benefit from the transit services on an equal footing. This is particularly the case for socially disadvantaged groups such as seniors, children, and low-income households. Generally, a walking distance of 400 m is used as a walkable distance threshold for bus stops in public transit design practice and age-friendly city guidelines. Unfortunately, due to irregular transit service regions or a dispersed distribution of bus stops, age-restricted communities which have become a popular residential option for older adults are not necessarily built in locations meeting the 400 m-criterion and thus provide limited accessibility to nearby bus stops. In this context, this paper aims to apply integer linear programming (ILP) to help redesign the existing bus route (or route segment) surrounding the locations of age-restricted communities in order to minimize the operation cost for transit agencies under a series of constraints including satisfying accessibility requirement of bus transit to seniors. Finally, a numerical example, based on the grid street pattern, is illustrated to demonstrate the applicability of the proposed method.

Original languageEnglish
Title of host publicationConstruction Research Congress 2020
Subtitle of host publicationInfrastructure Systems and Sustainability - Selected Papers from the Construction Research Congress 2020
EditorsMounir El Asmar, Pingbo Tang, David Grau
PublisherAmerican Society of Civil Engineers
Number of pages9
ISBN (Electronic)9780784482858
Publication statusPublished - 2020
Externally publishedYes
EventConstruction Research Congress 2020: Infrastructure Systems and Sustainability - Tempe, United States
Duration: 8 Mar 202010 Mar 2020


ConferenceConstruction Research Congress 2020: Infrastructure Systems and Sustainability
Country/TerritoryUnited States


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