The Jevons paradox (pronounced /ˈdʒɛ.vənz/, JEV-ənz) or Jevons effect is an economic phenomenon said to occur when technological improvements that increase the efficiency of a resource’s use lead to a rise, rather than a fall, in total consumption of that resource.[1][2][3][4] Greater efficiency reduces the amount of the resource needed per application, lowering its effective cost; if demand is sufficiently price elastic, this induces demand, frequently resulting in a net increase of total resource consumption
Its similar to this
I found it:
https://en.wikipedia.org/wiki/Braess's_paradox
It’s more about everyone trying to use their best route which might might be inefficient for the whole system, as OPs example nicely shows.
is this any different to the rebound effect, or are they both describing the same phenomenon in different ways?