There was a bit of debate over in the Largest Cities thread about whether it would be better to consider our largest metro areas instead. So, why not do both?
Rules for this exercise:
1. An Interstate or US Highway that exists in your state must reach one of the 50 largest metro areas by population (as of 2019) in the US.
2. The route in question must pass within the defined limits of the metro area.
3. You may count eligible metro areas within your state. Please list the total inside your state and the total reached outside your state.
4. You do not need to list the population of each metro area. Nor do you need to list every city in it; the core city will do just fine.
5. You may list duplicates as you wish (if more than one route from your state reaches a metro area), but be careful not to count duplicates more than once.
Please list the metro areas reachable directly from your state here. If you wish you may consider the 50 largest cities in this other thread: https://www.aaroads.com/forum/index.php?topic=28714.0
I'll start with Pennsylvania:
Inside PA: Philadelphia, Pittsburgh, New York City (Pike County, PA is part of the New York City MSA) (3)
I-70: Denver, Kansas City, St. Louis, Indianapolis, Columbus, Baltimore (6)
I-76: none added
I-78: none added, but reaches the core of the NYC MSA
I-79: none added
I-80: San Francisco, Sacramento, Salt Lake City, Chicago (4)
I-81: none added
I-83: none added
I-84: Hartford (1)
I-86: none added
I-90: Seattle, Cleveland, Bufalo, Boston (4)
I-95: Miami, Jacksonville, Raleigh, Richmond, Washington, Providence (6)
I-99: none added
US 1: none added
US 6: none added
US 11: New Orleans, Birmingham (2)
US 13: Virginia Beach (1)
US 15: none added
US 19: Tampa, Atlanta (2)
US 20: none added
US 22: Cincinnati (1)
US 30: Portland (1)
US 40: none added
US 62: Oklahoma City (1)
Pennsylvania's 3-digit Interstates and US Routes do not add to this list. Total: 32 (29 completely outside, 3 at least partly inside). The largest not directly reachable from PA is Dallas.
Apologies for any confusion. Let's do both city and metro area lists in the other thread. Feel free to remove this thread.
Entirely or partially within WI: Chicago (Kenosha County), MSP (Pierce and St. Croix counties), Milwaukee.
I-90: Seattle, Cleveland, Buffalo, Boston
I-94: Detroit
US-2: Seattle
US-12: Seattle, Detroit
US-41: Nashville, Atlanta, Tampa, Miami
US-51: Memphis, New Orleans
US-61: St. Louis, Memphis, New Orleans
So it's only 15 for Wisconsin.