Toward a State-Based Fidelity Assessment Framework for Transportation Digital Twins

11th International Scientific Conference Technics, Informatics and Education – TIE 2026, (pp. 391-398)

АУТОР(И) / AUTHOR(S): Ioannis Prokopakis , John Gialelis , Marjan Milošević  and Danijela Milošević  

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DOI: https://doi.org/10.46793/TIE26.391P

САЖЕТАК /ABSTRACT:

Transportation digital twins are widely used for mobility planning, traffic management, and scenario evaluation, yet their fidelity is rarely assessed through a consistent and transport-specific framework. A state-based Digital Twin Fidelity Index is proposed that evaluates fidelity relative to the transportation states required for a defined use case. The framework distinguishes structural, operational, and behavioral fidelity domains and assesses each target state across four dimensions: coverage, temporal adequacy, evidence sufficiency, and independent validation. A target-state registry is introduced to define the required states, resolutions, thresholds, validation references, and policy importance before scoring. The framework also supports data-acquisition planning by estimating the marginal fidelity gain associated with additional datasets and balancing that gain against cost, privacy, maintenance, and licensing constraints. The approach shifts fidelity assessment away from generic claims of realism or real-time synchronization toward a transparent assessment of what the twin represents and how well relevant states are reconstructed. It is intended as a diagnostic and reporting framework that can improve comparability, inform municipal investment decisions, and provide a basis for future empirical validation.

КЉУЧНЕ РЕЧИ / KEYWORDS: 

Digital Twin Fidelity Index; Transportation planning; Urban Mobility; Functional Observability; Target state registry

ПРОЈЕКАТ / ACKNOWLEDGEMENT:

This work is supported by Interreg IPA ADRION project ADDCAM2ZERO

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