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Z. Zhang

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2 records found

Access and Egress-Based Solutions to Station Crowding

Student report (2021) - J.K. Krom, F.L. Wilkesmann, A. Montes Rojas, Z. Zhang, R.U. Bhatt, N. van Oort, W.W. Veeneman, D. Ton, Menno de Bruyn, Mark van Hagen
The COVID-19 pandemic has had a substantial impact on public transportation. With ridership figures decreasing, it has brought a new sense of urgency to the old problem of crowding. Using a structured design approach, this paper presents the results of a project which set out to reduce crowding in Dutch train stations by
absorbing it at the network level. The design which is detailed in this paper uses advance communication of bike parking availability and price incentives on shared bikes as means to stimulate travellers to access or egress the railway system through alternative, uncrowded stations. It is determined that, theoretically, up to 7% of daily travellers in the Amsterdam region might use the system, suggesting that effects on station capacity would be substantial high adoption levels are realised. ...
Master thesis (2021) - Z. Zhang, N. van Oort, S.P. Hoogendoorn, P.K. Krishnakumari, F. Schulte, Max Schalow, Chingiskhan Kazakhstan
E-bike sharing has gradually gained popularity in recent years, while the research in this field is still quite limited. This study applies data-driven methods, mainly demand pattern analysis, to facilitate the development of operational strategies in a cost-effective and operator-friendly way. Demand pattern is analysed in an innovative spatial analytical unit, overlapping circle, which is proven to achieve more beneficial effects than the traditional units (i.e., the administrative units), and hourly clustering is conducted to derive the reallocation strategies by mitigations of imbalance in supply and demand in recurrent hourly clusters. Additionally, this work constructs several indicators to evaluate the strategies in a real-life context, taking both the operator and the users into account. The proposed methodology is applied in a case study, bondi’s e-bike sharing in The Hague with a 4-month time frame from 19-06-2021. There are 5 hourly clusters emerging via agglomerative hierarchical clustering: 1) the first peak hour (16:00-16:59); 2) the second peak hour (17:00-17:59); 3) the first transition hour (18:00-18:59); 4) the second transition hour (19:00-19:59); 5) the off peak (20:00-15:59). The corresponding reallocation strategies are then proposed to alleviate the imbalance in different periods. Additionally, adjustment in the operational areas is suggested by the supply efficiency and trip duration/distance analyses. The results prove that the operational strategies obtained from demand patterns indeed improve the service, with almost 1.5 times ridership, circa 20% decrease in vehicle idle time, compared to the baseline. and a decent monthly net retention rate at around 60%. ...