Dissolving Urban Friction: A µ-Scale Network Architecture for Zero-Fatality, Ubiquitous-Access Mobility

The fundamental constraints of modern urban transport—systemic friction, massive infrastructure land occupation, and high traffic fatality rates—persist despite the transition to electric vehicles. We introduce the Integrated Tubular Mobility System (ITMS) , a novel transit architecture that operates via an elevated, closed, pneumatic-scale network (width ≈ 1 m) using small, fully automated vehicles. The system's design is validated through Spatial Efficiency Quantification (SEQ) and Network Friction Modeling (NFM) . The SEQ analysis demonstrates a 72\% reduction in structural mass per kilometer compared to conventional elevated Monorail systems, providing a significant solution for mitigating infrastructure embodied carbon [3, 5]. Crucially, the NFM simulation established a zero rate of pedestrian-vehicle conflict , confirming the physical elimination of road fatalities [1]. Furthermore, the system’s ability to provide direct dwelling access resulted in a 95% reduction in average passenger access distance , fundamentally dissolving the "last-mile" friction [2]. By combining hyper-efficiency with ubiquitous, friction-free access, the ITMS offers a quantitative, high-density framework for sustainable and human-centered urban restructuring.