Once upon a time in Europe. First train passing through the St. Gotthard tunnel, Switzerland, 1880
From European Digital Museum of Science and Technology, First train passing through the St. Gotthard tunnel, Switzerland, 1880 Source...https://www.inventingeurope.eu/story/eerste-tunnel-door-de-bergen-brengt-midden-e...Delhi: Pragati Maidan tunnel witnesses waterlogging due to rain
The tunnel will be used by delegates during the G20 Summit. https://www.devdiscourse.com/article/science-environment/2436307-delhi-pragati-maidan-tunnel-witnesses-waterlogging-due-to-rainOptimal tunnel lighting design in aspect of lighting quality and energy performance
A tunnel surface with low reflectance degrades the lighting quality, resulting in minimum luminaire spacing and poor energy efficiency. Graphical ... https://www.sciencedirect.com/science/article/pii/S0886779822004771
cover tunnel photo by: Matt Brown from London, England / CC BY
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