[iheartthed]

Limited to the 37 metros in the US and Canada with populations of 2 million or more.

Count of +2 million metros within roughly 300 miles by city:

1. Cleveland 9
2. Chicago 7
3. Cincinnati 7
4. Detroit 7
5. Indianapolis 7
6. Pittsburgh 7
7. Columbus 6
8. Baltimore 5
9. Philadelphia 5
10. St. Louis 5
11. Washington 5
12. Austin 4
13. Dallas 4
14. Houston 4
15. Nashville 4
16. New York 4
17. San Antonio 4
18. Boston 3
19. Las Vegas 3
20. San Diego 3
21. Toronto 3
22. Atlanta 2
23. Los Angeles 2
24. Miami 2
25. Montreal 2
26. Orlando 2
27. Phoenix 2
28. Portland 2
29. Seattle 2
30. Tampa 2
31. Vancouver 2
32. Charlotte 1
33. Kansas City 1
34. Sacramento 1
35. San Francisco 1
36. Denver 0
37. Minneapolis 0

Average number of cities within roughly 300 miles by region:

1. Midwest 4.6
2. Northeast 4.5
3. Southwest 3.5
4. South 2.1
5. West 2.1
6. Canada 1.3

Count of +2 million metros within roughly 200 miles by city:

1. Pittsburgh 5
2. Columbus 5
3. Detroit 4
4. New York 4
5. Cleveland 3
6. Indianapolis 3
7. Washington 3
8. Philadelphia 3
9. Baltimore 3
10. Austin 3
11. Cincinnati 2
12. Houston 2
13. San Antonio 2
14. Toronto 2
15. Miami 2
16. Seattle 2
17. Tampa 2
18. Orlando 2
19. Chicago 1
20. Dallas 1
21. Boston 1
22. San Diego 1
23. Los Angeles 1
24. Portland 1
25. Vancouver 1
26. San Francisco 1
27. Sacramento 1
28. St. Louis 0
29. Las Vegas 0
30. Atlanta 0
31. Phoenix 0
32. Montreal 0
33. Charlotte 0
34. Kansas City 0
35. Nashville 0
36. Minneapolis 0
37. Denver 0

Average number of cities within roughly 200 miles by region:

1. Southwest 2.5
2. Northeast 2.3
3. Midwest 2.3
4. South 1.3
5. West 0.9
6. Canada 0.0

Count of +2 million metros within roughly 100 miles by city:

1. Baltimore 2
2. Cincinnati 2
3. Philadelphia 2
4. Austin 1
5. Cleveland 1
6. Columbus 1
7. Detroit 1
8. Indianapolis 1
9. New York 1
10. Orlando 1
11. Sacramento 1
12. San Antonio 1
13. San Francisco 1
14. Tampa 1
15. Washington 1
16. Atlanta 0
17. Boston 0
18. Charlotte 0
19. Chicago 0
20. Dallas 0
21. Denver 0
22. Houston 0
23. Kansas City 0
24. Las Vegas 0
25. Los Angeles 0
26. Miami 0
27. Minneapolis 0
28. Montreal 0
29. Nashville 0
30. Phoenix 0
31. Pittsburgh 0
32. Portland 0
33. San Diego 0
34. Seattle 0
35. St. Louis 0
36. Toronto 0
37. Vancouver 0

Average number of cities within roughly 100 miles by region:

1. Northeast 1.0
2. Midwest 0.7
3. Southwest 0.5
4. South 0.3
5. West 0.2
6. Canada 0.0

Roughly measured from city center to center and counted cities that fell within a few miles of the cutoff (less than 10). Northeast includes traditional Northeast corridor cities plus Pittsburgh. Southwest only includes Texas, as those were the only cities in the region large enough to make the threshold. All other designations are self-explanatory.

Observations: The Midwest should really have MUCH better inter-city rail. It is the most well spaced region of the country for a rail network. Texas also makes a lot of sense for inter-city rail.

ETA: I did not consider Riverside-San Bernadino-Ontario as a separate "city".

Edited Feb 10, 2024: Correcting the 300 mile radius counts for Nashville and St. Louis.