One page information about the public transportation in megacities

I want to collect some information about the public
transportation in megacities in Saudi Arabia (Riyadh, Jeddah, Makkah and
Medina) and compared to other cities in the USA with the same size and
population

This are the information
I am looking for

– research the
population in each city and how many streets and highways they have.

-research according to
the cities of the same size, how many buses or train lines the city needs and
how many stops and stations each city needs.

– research how much
taxes megacities cost the privet cars.

– how much it cost to
prepare a megacity with a good public transportation.

thank you very much