We apply the Information-Theoretic Unification (ITU) framework (Terada 2026, concept DOI 10. 5281/zenodo. 20109209; current version v2. 0. 0 at 10. 5281/zenodo. 20133709) to infrastructure and power grid systems. Infrastructure is reframed as Kᵢnfrastructure = Kcapital × Kₙetwork × Kₘaintenance — the K-skeleton (physical foundation) of civilization. This is Tier 1 paper #15, opening the K-skeleton axis and bringing the ITU polytope to 15 vertices. The Infrastructure vertex connects to 7 other vertices (degree 7). Pass-1 progress: 102 of 220 phases (46. 4% — past mid-point of Pass-1). Phase 99: ITU foundation. Global infrastructure capital stock = 340 trillion (3. 2x world GDP), annual renewal 10T (3% of stock). Power consumption 1990 11, 800 to 2050 70, 000 TWh (5. 9x). Grid inertia H = 6. 0s (1990) to 1. 5s (2050 NZE) — below the 2. 5s safety threshold, requiring grid-forming batteries. USA ASCE 2021 grade D+ (avg score 1. 49), 10-year need 3. 1T (1T roads alone). Kcapital dynamics: 1. 5% USA investment → 29% decline over 50 years vs 2. 5% sustainable. Phase 100 (MILESTONE): Smart grid + AI + resilience. Smart meters: 2B (2024, 20%) to 10B (2050, 95%). DERMS (rooftop solar + V2G + home batteries + heat pumps + smart buildings): 480 GW (2024) to 8, 500 GW (2050) — exceeding central generation 7, 000 GW (1. 21x ratio). AI predictive maintenance: accuracy 90% (2024 advanced) to 99% (2035 AGI), cost reduction 50%, downtime reduction 94%. Resilience simulation under 30-day attack: AI-resilient grid R = 1. 10 (attacks become learning opportunities) vs old grid R = 0. 66. Phase 101: Industry, policy, international comparison. China leads with 1. 5T/yr investment (8% GDP, 2. 5x USA) via Xinjianjie 1. 4T (5yr). USA IIJA 1. 2T over 10yr + IRA 369B. EU NextGenEU EUR 750B + RePowerEU EUR 300B. Japan Kokudo Kyojinka (5yr) 100B focuses on aging + disaster. India NIP 1. 3T. PPP global market: 20B (2000) to 200B (2024) to 600B (2050), 1, 200 projects. Climate adaptation per IPCC AR6: 4. 5T cumulative by 2050. Phase 102: 2026-2050 roadmap with 19 milestones and 10 falsifiable predictions (Pₐvg = 0. 55). Key milestones: 2026 China Xinjianjie Phase 2, 2030 smart meters 40% global, 2032 MOSE expansion + Tokyo basin complete, 2035 V2G commercial, 2040 DERMS 5, 000 GW, 2045 AGI infrastructure management, 2050 DERMS 8, 500 GW (exceeds central) + climate adaptation 4. 5T cumulative. Central thesis: infrastructure = K-skeleton (physical foundation) on which all other K-flows operate. dKcap/dt = Kᵢnvest - Kdecay is the governing equation, with most countries underfunding leading to intergenerational debt. AI (Tier 1 #2) + Robotics (#13) + Communications (#14) enable smart, self-healing, predictive infrastructure. The ITU 15-vertex polytope completes with K-skeleton axis. Infrastructure bidirectionally connects to AI/ASI (#2), Semi (#4), Economics (#8), Energy (#10), Climate (#11), Robotics (#13), Communications (#14). Communications (#14) and Climate (#11) remain tied as super-hubs at degree 10. Honest framing: Pass-1 interpretive paper reframing ASCE Report Card 2021, IEEE Power & Energy Society, IIJA/IRA/NextGenEU/Xinjianjie/Kokudo Kyojinka, IPCC AR6, McKinsey, World Bank, IEA, Singapore Virtual Singapore, NVIDIA Omniverse in ITU language. Numerical results match established literature. Includes 4 theory documents, 4 Python numerical experiments, 4 figures (PNG), 4 JSON summaries. Total runtime ~15 seconds.
Munehiro Terada (Sat,) studied this question.