Roadgeek "shower thoughts"

[Hwy 61 Revisited]

Harrisburg is the smallest city in the United States with a completely-limited-access beltway.

That's not terribly meaningful because of the fractured nature of municipal structure in Pennsylvania. Population within the limits of the City of Harrisburg itself is roughly 50,000, but the number of people with Harrisburg addresses is close to 160,000. Harrisburg's metro area population is over 575,000, which is greater than such metros as Springfield (MO),  Montgomery (AL), and Topeka–all of which feature a city center bound on all sides by limited access highways that a state DOT could arbitrarily declare to be a "beltway" .

I meant, in the sense that it is a freaking tiny city with shitloads of traffic for its size. I also meant within city limits, although the addresses argument could be a good one.

[I-55]

4 2dis end within 41 miles crossing out of Illinois over the Mississippi River (I-57, I-64, I-72, I-74) and 4 more (I-12, I-44, I-55, I-88) end within 10 miles of the river yet don't cross it (I-55 crosses twice but they're over 300 miles away). When I-57 is completed to Little Rock it will be 3 for the first scenario.