Your question is very interesting, but I'll be careful what I say so as not to provoke debate.
I think the criteria of population and density are important. However, there are also criteria related to development capabilities that complement other modes of transportation. If we want to have a structuring project that will maximize the use of the various modes of transportation and also optimize them in relation to land use and the structures used for procurement, I think all these criteria are the most appropriate to enhance all the other modes of transportation.