There has been some recent progress on this: https://www.amsterdamumc.org/en/spotlight/tiredness-experienced-by-long-covid-patients-has-a-physical-cause.htm
Apparently, avoiding cardiovascular exercise helps. Anecdotal comments on Reddit suggest that adding in some weightlifting helps as well. Good luck.
In addition to what was mentioned already, read Door to Door, and use this famous constant (by an Italian!) as a counter argument if the function of the road/project is to solve traffic.
If you really want to feel out: Braess’s Paradox.