Based on the great and very informative work by @h_classen! See …
The premise:
Would be a nice-to-have feature if the speed of the dash lines changes according to local regions, but it seems it would be a bit much for the dash line logic, to be honest.
Version based on CSS variables
I played around using animations and symbols, masked by group overflow hidden. It doesn't have a dynamic aspect that would react to a slider, though… flow-rate.hype.zip (21,4 KB)
