I work on a team building a real-time display of energy flows (production and consumption) on a regional basis (by municipalities). This is mainly used in town halls on a flat-screen display but of course publicly accessible as well. It‘s made with VueJS but will be rewritten with Svelte very soon. Here‘s one example of one of over 140 municipalities at the time of this writing:
How exciting this would be to cycle through the tunnel once the tunnel is completed but not yet released to public (car) traffic? Near Hamburg people enjoy riding their bikes on a nearly completed section of a new motorway although it's strictly forbidden.
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https://energiemonitor.bayernwerk.de/abensberg