Lots of parallel US and interstate routes have numerous interchanges. See US 60 and I-64, US 25 and I-75, US 11 and I-81. How many non-parallel routes have more than one interchange?
Examples would include US 68 and I-24 in Kentucky (an exit near Paducah, another at Cadiz) and US 68 and I-75 (one interchange in Lexington, Ky. and one south of Bowling Green, Ohio).
Examples would not include US 27 and I-75 because they can be considered to be parallel routes even though there is some distance between them.
We should probably exclude beltways.
EDIT: US 23 and I-75, US 202 and I-89, US 62 and I-190
I-95 and US 2 between Bangor and Holuton, ME.
I-93 and US 302 near Littleton, NH.
I-89 and US 2 from Colchester to Montpelier, VT.
I-89 and US 4 between Hartford, VT and Laconia, NH.
US 41 and I-75 have a ton of them, especially in Georgia. I'm not clear on where some of the Georgian multiplexes are so I don't have an accurate count...but it's a lot.
US 101 and I-5? They do count?
US 20 and I-84 :bigass:
Quote from: Max Rockatansky on May 22, 2016, 04:30:37 PM
US 41 and I-75 have a ton of them, especially in Georgia. I'm not clear on where some of the Georgian multiplexes are so I don't have an accurate count...but it's a lot.
How are US 41 and I-75 not parallel?
Would I-66 and US-29 count in Northern Virginia?
I-95 and US 202, in both Delaware and Maine.
US 7 and I-89 between Burlington and Highgate Springs (they're perpendicular south of Burlington)
US 9 and I-90 (3 times) on the free 90 near Albany.
You might also want to exclude multiple 3DI's (US 1 has interchanges with 5 different I-295's)
US 10 and I-94 at Fargo, ND St. Paul, MN and Osseo, WI. US 52, US 12, and US 53 parallel I-94 between those 3 cities. Historically, there was another interchange between the 2 in Detroit, MI until US 10 was decommissioned in 1987. US 10 was parallel with I-94 west of Fargo until its western end, but the stretch east of Fargo clearly never was.
I-287 has two interchanges with US 206, exits 17 and 22, though they are both incomplete, so only 287 South to 206 South and 206 North to 287 North are duplicated.
I would consider US 23 and I-75 to be parallel routes.
As for US 29 and I-66, those interchanges are in close proximity where the routes do parallel each other, so I'm not sure.
I-94 and US-12 (New Buffalo, MI and Ypsilanti, MI)
Not sure if it counts, but US 11 and I-459 in Birmingham, AL intersect twice. Though I-459 is a bypass of I-59 through Birmingham, which is why I'm not sure if it counts.
How far away do the routes have to get for them not to be considered parallel? For instance, US-30 and I-80 get up to 40 miles apart between their junctions in eastern Wyoming and Joliet, IL, but they still both run parallel to each other (strictly speaking).
Same deal (but more distance) with I-75 and US-127 between Grayling, MI and greater Cincinnati.
(edited wording -PC)
For that instance, US 101 and I-5 between, duh, both ends of US 101. The first starts going East-West, and goes around the Olympic peninsula before ending at I-5.