Technology readiness level. NASA Technology Readiness Levels Technology readiness levels (TRLs) are measures used to assess the maturity of evolving technologies (devices, materials, components, software, work processes, etc.) during its development and in some cases during early operations.
Generally speaking, when a new technology is first invented or conceptualized, it is not suitable for immediate application. 千葉モノレール. In History II. Ferroutage. Un article de Wikipédia, l'encyclopédie libre.
Sur la ligne de Konkan (Inde) Le ferroutage, ou transport « combiné accompagné » consiste à charger des camions complets sur un train : tracteur + remorque + chauffeur. Richard Gilbert.