For example: the stretch of interstate running East and West on the south side of Milwaukee is designated as I-43, I-41, and I-894. That’s a grand total of 3 different interstate highways using the exact same stretch of road.
Also notable about that stretch is the fact that one is going in I-43 Southbound and I-41 Northbound when going westbound on it, and vice-versa when going eastbound.
Any routes with 4 or more different interstate designations on the exact same piece of roadway?
Years ago I called 911 for some reason or another (accident or drunk driver or something), when the dispatcher asked where I was I said I-94 East, just past College Ave and thus started a back and forth of “Yes, I’m really on I-94 East just past college” and her saying “I-94 doesn’t go east”.
Granted the back and forth was only one or two times before I realized I needed to tell her that I was headed south on I-94. But had I been from out of town or otherwise unfamiliar with the area, it could have been an issue since the signs say EAST 94 and don’t accurately reflect your direction of travel.
I always figured that must be really confusing for people further South (ie Racine/Kenosha/Northern Illinois) that may not be aware the 94 actually does go East and West for the Madison/Milwaukee stretch. I always think about which way I’d be going on that part of the freeway to remember that 94E goes South and 94W goes North instead of it just being something you have to memorize.
These are called highway concurrences. I know of no three-way Interstate concurrence, though one comes close. I-94 and I-80 are the same south of Chcago. Whn I-94 turns north into Chicago the continuing road becomes I-80 and I-294 bypass so there might be a tiny bit at the interchange that’s all three.
The longest two-way concurrency is I-80 and I-90 for 265 miles in Ohio west of Cleveland and across Indiana.
I’ll believe you but that doesn’t seem to be what google maps indicates. Going north on I-94, I-41, the latter cuts off to the west while I-94 continues East for a bit then north. I-43 joins I-94 just where I-41 leaves it. That’s why I-43 and I-41 share a roadway.
This only shows major interstates, so there may be a spot where a spur overlaps one of thesdoubles, but I couldn’t find one in any of the cities I’m familiar enough with to poke around.
Sometimes you get a bridge and approaches shared between different interstates. Until 2014, the Poplar Street Bridge over the Mississippi River between St. Louis, Missouri, and East St. Louis, Illinois carried I-70, I-64, and I-55 concurrently. In 2014, I-70 was re-routed over a new bridge farther north.
It is suspected (but has not been officially announced) that when the Indiana DOT finally finishes the southern section of I-69, it will connect the new interstate to the northern section of I-69 by officially designating part of the southern section of the Indianapolis beltway (I-465) as I-69 as well. Another part of the southern section of I-465 is already concurrent with I-74. This would lead to a triple concurrence for about 14 miles on the south side of Indy.
Completion of the southern section of I-69 is expected around 2025, so check back then.
This isn’t a triple concurrance, but I thought it interesting: West of Lansing MI, there’s a roughly 5-mile long concurrence of I-69 with I-96. Must make it fun for lysdexics.
Actually, I don’t think that they do. I-43’s northern terminus is at the point where it meets I-41 in the village of Howard, just NW of the city of Green Bay (a point that is about 2 miles away from my father’s old hardware store). At that same interchange, I-41 ceases to have an Interstate designation, and reverts to being only US 41 and US 141 from that point north.
