EC

E. Chen

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An assessment framework using agent-based simulation

Aims
Railway station areas can play a crucial role in promoting sustainable development if integrated with cities and be fluctuation-responsive through effective urban design. However, during the design stage, assessing the station areas' performance, of which user satisfaction is indicative, is challenging due to methodological limitations. Agent-based simulation (ABS) is promising as it can link spatial features with agents' behavior features. This research questions to what extent ABS can help assess the urban design of station areas.

Methods
This paper adopts the user pyramid as the theoretical framework, which outlines five types of user needs: safety, speed, ease, comfort, and experience. The paper selects indicators linking satisfaction and spatial features at the district and building levels. These indicators are measured in the simulation of the station system using digital tools, including MassMotion and Python scripts. The theory, indicators, and tools, in combination, serve as an assessment framework. Rotterdam Central Station is used as a case to demonstrate how the framework works.

Results
The framework is capable of assessing design alternatives by identifying changes in user satisfaction. It can be applied on the district level (at a scale of 250 m) with substantial details to inform design decision-making, and it is useful during the design stage when only limited data is available. This paper strengthens the scientific knowledge of railway station areas through the multidisciplinary literature review that translates user needs for urban design use, and it advances the digital means to visualize user satisfaction affected by design. ...
Design principles are widely used in the design field, yet some remain visionary rather than grounded in real-world applications. Assessing their effectiveness is therefore essential before implementation. This study focuses on a set of visionary design principles intended to promote the flexible use of railway station areas: (1) Ensuring event visibility by aligning paths and spaces; (2) Incorporating reconfigurable elements and reconfiguration-supportive layouts; (3) Establishing high-quality connections at different scales; (4) Adopting scattered layouts for high capacity or vibrancy; (5) Prioritizing core spaces for humans instead of vehicles. This study aims to address the gap in validating these design principles. Recognizing the potential of jointly employing research-by-design and agent-based simulation, this study presents a major research question: How effective are these design principles, as demonstrated through research-by-design (RbD) and agent-based simulation (ABS)? Methodologically, it first applies the design principles to Station Xtreme and generates multiple design proposals, then simulates the generated proposals, followed by assessments and reflections. The results suggest that the principles are generally effective, though limitations emerged: for example, quality connections may demand greater investment and space, while scattered layouts can increase wayfinding difficulty and operational complexity. This study contributes to the growing body of design knowledge by validating these flexible-use principles. It also introduces a transferable conceptual framework that integrates RbD and ABS, offering a novel methodological approach for testing other visionary design principles. ...

Towards Mobility Resilience and Public Space Flexibility

Introduction: In China, Station-City Integration is proposed by the design academy in China to solve problems and add value. This research focuses on urban design for the redevelopment of Old Major Railway Stations in Megacities in China.

Problems & Goals: From our focused cases, two problems are discovered: Stuckness and congestion on peak days, Space underuse on normal days. Two goals are proposed correspondingly: Mobility Resilience and Public Space Flexibility.

Knowledge Gaps: Theoretical and practical knowledge are lacking for the proposed goals. The component words of the goals all have rich meanings. Some of them have related assessment tools and design recommendations.

Research Questions: For urban design research and practice, how can Mobility Resilience and Public Space Flexibility be defined, assessed, and designed?

Deliverables: The deliverables will be Concept Definitions, Assessment Frameworks, and Design Principles. The Concept Definitions offer researchers a new way to see the Station City problems. The Assessment Frameworks offer researchers a new tool to assess the Station City problems through different dimensions. It can also be used for evaluations during the iterative design process. The Design Principles can be used for the scheme establishment.

Methods: For Concept Definitions, papers about mobility, resilience, public space, and flexibility were examined to propose definitions. For Assessment Framework, available technologies & data will be tested. For Design Principles, case studies of the best practices will be conducted.

Relevance: Scientifically, the Problem Identifications show a creative way of framing research problems between specification and generalization. These Concept Definitions show a solid way of transferring knowledge from other disciplines to urban design fields. Societally, the Problems Identifications and Concept Definitions set a starting point for practitioners to take action. The Assessment Frameworks and Design Principles are practical tools for designers. ...