This one is tricky to explain. Sequential exit number states are not included in this discussion because a state could have 2 exits in a state (exit 1 and exit 2) and spend 95 miles in a state:
My example would be I-44 in Oklahoma City. If you are traveling eastbound (mile markers increasing) on the north side of Oklahoma City, I-44 merges and co-signs with I-35 north (also mile makers increasing), but using I-35 mileage and exit numbers. At the point of the merge, I-35's mile markers are 3 miles ahead of I-44. When I-44 eastbound turns off I-35 onto the Turner Turnpike, the exit is 138A, but I-44 is still at mile marker 135. If there was an exit right after I-44 turn onto the turnpike it would be labeled exit 135, but I-35 had an exit 135 for Britton Rd. before that. So for through I-44 travelers, you see exit 129, then merge on to I-35 then see miles 133-138 with an exit 135 in between, then turn off onto the turnpike to see exit 135 again within a 3 mile stretch. Again, the above situation doesn't exist, but are there other instances of quickly repeated mile markers and exit numbers on a through route?
Another situation could be an interstate spending a very short time in a state, crossing into another state, having the mile makers reset and then having close exits with the same number as a result. An example is, again, I-44. It terminates in Wichita Falls, a mere 14 miles from the Oklahoma/Texas state line. When it begins there is an Exit 1A-D. It then crosses Oklahoma and has it's first exit 1 just 14 miles from the last Exit 1, although there were letter suffixes.
Of course there are weird oddities all over the place. Let's hear em'.
I-470 (Wheeling edition) has 2 exit 1's 7 miles apart courtesy of mileage resetting at the Ohio River - US 250/WV 2 in West Virginia (https://www.google.com/maps/@40.0515964,-80.7128426,3a,75y,272.44h,83.75t/data=!3m6!1e1!3m4!1sBVccQbWdrcdOmLlgbxt-mA!2e0!7i13312!8i6656!5m1!1e1?hl=en), and Banfield Road/Mall Road in Ohio (https://www.google.com/maps/@40.0697501,-80.8457242,3a,75y,277.79h,90.09t/data=!3m6!1e1!3m4!1sYwEP4hN7L9AdcJHY0Mk3gw!2e0!7i13312!8i6656!5m1!1e1?hl=en).
Closest are on I-195 in RI and MA if you allow for suffixes (MA hasn't converted its portion yet, but the number will remain the same). The Exit 1's in RI and Exit 1 in MA are about 3 miles apart.
Try the Westernmost reaches of I-74 in the Quad Cities. It has exits 1-4, then crosses the Mississippi and has again exits 1-4.
I-480 in Ohio sees 2 numbers twice by way of overlap with I-271, with the numbers increasing then decreasing then increasing again after heading eastbound because of the overlap with 271 southbound.
The numbers in question are 22 (used to be 21) and 23. Eastbound on 480, you see exit 22 for SR 17 and later see a new ramp marked exit 22 for I-271 southbound. (There used to be an exit 21 off I-271 for 480 EB but that number is gone with the new arrangement; traffic to 480 now uses exit 23 and to return to 271 you use the new exit 22.) Between the two 22s, exit 23 is for SR 14 and then later you see another exit 23 (off I-271/480) which is also for SR 14!
Exit 26 would also be a part of this but you don't see it twice in either direction; eastbound you see it for US 422 and I-271 NB; westbound you take exit 26 off I-271 as the overlap ends, in a different location. But it is all part of the same general interchange complex.
I-220 in Shreveport is exit 11 off of I-20, being 11 miles from the Texas state line. 11 miles later, just across the river in Bossier City, I-220 has its own exit 11.
I-40 in Memphis, due to the cancellation of the route through Overton Park. When it was rerouted onto I-240, Tennessee never changed its mileage and exit numbers to match, so I-40 actually uses I-240's numbers before switching to its own. The results in exit 12 being encountered twice within a couple miles heading east (the numbering goes 10, 12A/12C, 12).
Up north, this happens on the Trans-Canada due to the fact that ON 417 measures distances and exit numbers from the east, not the west, while A-40 handles this normally. Both have exit 9, so heading west (ON 417 exit 9 is a half interchange) you encounter them only 18 km apart.
Since I-70 continues I-270's mileage across most of Illinois, this leads to a repeated exit on I-70 west outside St. Louis: Exit 15 for I-55 north/I-270 west (https://www.google.com/maps/@38.7532157,-89.8946556,3a,45.1y,267.18h,90.29t/data=!3m6!1e1!3m4!1sl5ZN1AisCMZRoSz5F2WmPw!2e0!7i16384!8i8192!5m1!1e1?hl=en) (signed as exit 20 on I-55/I-70 east), followed by exit 15 for IL 159 (https://www.google.com/maps/@38.7086819,-89.9553731,3a,75y,275.63h,89.25t/data=!3m6!1e1!3m4!1s-im8Bll8RlbZ4IZ-SbsX9w!2e0!7i16384!8i8192!5m1!1e1?hl=en) 5 miles later.
I-80 has Exit 2 in Indiana near the IN/IL border (as part of 80/94) at Indianapolis Blvd/US 41 South, and then 7.5 miles later, has Exit 2 in IL near the IN/IL border (as part of 80/294) at Halsted St/IL 1
I-80 uses I-294's mileage for their multiplex, which makes this possible. If 80/294 used I-80's mileage, this would not occur
I found a triple: I-81 has exit 5 in West Virginia, Maryland, and Pennsylvania - that's three of them in less than 50 miles!
Quote from: jmacswimmer on July 27, 2020, 09:26:17 AM
I-470 (Wheeling edition) has 2 exit 1's 7 miles apart courtesy of mileage resetting at the Ohio River - US 250/WV 2 in West Virginia (https://www.google.com/maps/@40.0515964,-80.7128426,3a,75y,272.44h,83.75t/data=!3m6!1e1!3m4!1sBVccQbWdrcdOmLlgbxt-mA!2e0!7i13312!8i6656!5m1!1e1?hl=en), and Banfield Road/Mall Road in Ohio (https://www.google.com/maps/@40.0697501,-80.8457242,3a,75y,277.79h,90.09t/data=!3m6!1e1!3m4!1sYwEP4hN7L9AdcJHY0Mk3gw!2e0!7i13312!8i6656!5m1!1e1?hl=en).
I-70's PA and WV exit 1s are quite close together as well (15 miles) as it travels through the thin northern panhandle.
Edit for Clarification:
Most of you have understood, but I am talking one route here. I am not talking about I-XYZ having exit 2, then terminating into parent I-YZ where just after the termination, I-YZ has an exit 2.
Usually it comes from an interstate multiplex, an interstate crossing state lines very rapidly or an interstate being routed on a tollway that uses it's own mileage and exit numbering system.
The inverse situation to this, in one state, Interstate 10 heading eastbound encounters Exit 153 for Michigan Flat. 419 miles later in San Antonio, after it has multiplexed with I-35, using I-35 mileage and exit numbers, I-10 exits I-35 as Exit 153. That's a long way to have 2 exits with the same number on the same route within the same state, as not many routes even stay in the same state for 419 miles, much less encounter that situation after 419 miles.
Honorable mention, the longest repeated exit due to mile posts resetting at state lines also goes to I-10. Heading westbound from The New Mexico/Texas state line, you pass Exit 8, SH 178 / Paseo del Norte, Artcraft Road. 881 miles later, in Louisiana, you pass Exit 8, LA 108 — Vinton.
How about instead of just the exit number repeating, it's the content of the sign?
On I-35 passing through the Arbuckle Mountains of Oklahoma, you get exit 47 for "US-77 — Turner Falls Area". Then you get a Scenic Turnout. Then you get exit 51 for "US-77 — Turner Falls Area". Then you get...a Scenic Turnout.
The first time I passed through this area I was a kid and it was dark and I was a little concerned were stuck in a time loop or something.
On I-87 in New York, exit 1 on Major Deegan Expy is about 9 miles from exit 1 on the NY Thruway.
I-87 has a third exit 1 about 150 miles north of that.
Not yet officially signed as a unified I-265 despite having AASHTO approval to do so, Exit 10 in Indiana on I-265 (presently IN 265) for IN 62 is 31 miles from I-265's Kentucky termination at I-65 south of Louisville, which is also Exit 10
Quote from: Scott5114 on July 27, 2020, 05:26:03 PM
How about instead of just the exit number repeating, it's the content of the sign?
On I-35 passing through the Arbuckle Mountains of Oklahoma, you get exit 47 for "US-77 — Turner Falls Area". Then you get a Scenic Turnout. Then you get exit 51 for "US-77 — Turner Falls Area". Then you get...a Scenic Turnout.
The first time I passed through this area I was a kid and it was dark and I was a little concerned were stuck in a time loop or something.
Funny you mentioned this. I drove through there yesterday. I knew the scenic turnout was coming and was looking to take the exit, so I wasn't focusing on the Turner Falls exit, but I did seem to think I was seeing it an awful lot.
Quote from: Scott5114 on July 27, 2020, 05:26:03 PM
How about instead of just the exit number repeating, it's the content of the sign?
I imagine we must've done this before, but I'll bite.
I-490 southeast of Rochester has three (https://www.google.com/maps/@43.0617743,-77.4714347,3a,47.7y,174.75h,86.01t/data=!3m6!1e1!3m4!1ss6gC2yGyXNJkYKJkBSjcoQ!2e0!7i16384!8i8192!5m1!1e1) consecutive (https://www.google.com/maps/@43.0452926,-77.4632643,3a,75y,170.81h,85.16t/data=!3m6!1e1!3m4!1s0Gx7jVd_PY7d7Gq-kF-8DA!2e0!7i16384!8i8192!5m1!1e1) exits (https://www.google.com/maps/@43.0204143,-77.4439056,3a,43.5y,152.88h,89.88t/data=!3m6!1e1!3m4!1slh3oKx7mg7yG3k5bsbFdAw!2e0!7i16384!8i8192!5m1!1e1) for NY 96. No repeat controls, though.
And then you have I-81/US 11...
I-72 has an exit 96 for MacArthur Blvd on the south side of Springfield. 5 miles to the east, in its overlap with I-55, there's an exit 96 for IL 29.
US-93 has two consecutive exits numbered 2 about 3 miles apart, one on each side of the AZ/NV border. The Nevada side uses I-11's mileage, the Arizona side uses the mileage of the entire Hoover Dam bypass.
I-95 in VA used to have 3 exit 2s, 3 exit 3s, and 3 exit 4s, due to the Capitol Beltway and the Richmond-Petersburg Turnpike having independent exit numbering. Not sure when this was fixed, I assume before VA went to mileage-based exits.
Exits 100 and 101 on I-71 in Ohio occur just south of and at I-270 near Columbus, and 6 miles later there's exits 100A-B and 101B courtesy of I-70's mileage in downtown Columbus.
Quote from: Ben114 on July 27, 2020, 05:44:06 PM
On I-87 in New York, exit 1 on Major Deegan Expy is about 9 miles from exit 1 on the NY Thruway.
I-87 has a third exit 1 about 150 miles north of that.
I thought he said sequential states were excluded for the purpose of this exercise. Although there's a neat one coming soon: On I-90, Exit B3 and new Mass Pike Exit 3 (current Exit 1) will be a little under 4 miles apart.
Quote from: vdeane on July 27, 2020, 02:42:11 PM
I found a triple: I-81 has exit 5 in West Virginia, Maryland, and Pennsylvania - that's three of them in less than 50 miles!
Here's another one: I-83 uses I-695 exit 24 (https://www.google.com/maps/@39.4207359,-76.6456287,3a,75y,104.09h,85.05t/data=!3m6!1e1!3m4!1sA0e34ImG0GC7uJm09FLtzA!2e0!7i16384!8i8192!5m1!1e1?hl=en) to depart the Baltimore Beltway after their short overlap, then passes its own exit 24 (https://www.google.com/maps/@39.5409591,-76.6663403,3a,43.1y,9.63h,84.73t/data=!3m6!1e1!3m4!1sY9KNdySSOzZWjZBMOY4JgQ!2e0!7i13312!8i6656!5m1!1e1?hl=en) 10 miles later, followed by exit 24 in PA (https://www.google.com/maps/@40.0154601,-76.7412302,3a,75y,9.67h,89.83t/data=!3m6!1e1!3m4!1sISLdjraVpQy2fCeF3FM5mg!2e0!7i16384!8i8192!5m1!1e1?hl=en) another 37 miles after that!
Quote from: Scott5114 on July 27, 2020, 05:26:03 PM
How about instead of just the exit number repeating, it's the content of the sign?
On I-35 passing through the Arbuckle Mountains of Oklahoma, you get exit 47 for "US-77 — Turner Falls Area". Then you get a Scenic Turnout. Then you get exit 51 for "US-77 — Turner Falls Area". Then you get...a Scenic Turnout.
The first time I passed through this area I was a kid and it was dark and I was a little concerned were stuck in a time loop or something.
Check out the two exits for Monterey on I-40 in Tennessee.
Quote from: jp the roadgeek on July 28, 2020, 02:57:41 AM
Quote from: Ben114 on July 27, 2020, 05:44:06 PM
On I-87 in New York, exit 1 on Major Deegan Expy is about 9 miles from exit 1 on the NY Thruway.
I-87 has a third exit 1 about 150 miles north of that.
I thought he said sequential states were excluded for the purpose of this exercise. Although there's a neat one coming soon: On I-90, Exit B3 and new Mass Pike Exit 3 (current Exit 1) will be a little under 4 miles apart.
Yes, he did. That said, I'll list one below because it's just THAT absurd:
I-278 heading west out of New York has exit 3 as the last exit (there is no 2 or 1) and then in NJ, all the exits are 3A, 3B, and 3C (there is no 1 or 2, and the road isn't anywhere close to 3 miles long). The NJ numbers are recent, too - prior to a year or two ago, they had no numbers. I always assumed the Port Authority was just too lazy to change the I-95 numbers back to mileage-based, but after they did this to I-278, I'm starting to wonder if they just like having nonsensical exit numbers.
I-295 south in DC passes exit 1 for the US Naval research Lab (https://www.google.com/maps/@38.835249,-77.0120127,3a,75y,227.77h,87.8t/data=!3m6!1e1!3m4!1sbQwXxtTCXTabZCDYOOaRdA!2e0!7i16384!8i8192!5m1!1e1?hl=en), then 2 miles later crosses into MD and hits I-95/495 and the National Harbor at exits 1C-B-A (https://www.google.com/maps/@38.8010092,-77.0210617,3a,45.2y,158.81h,89.69t/data=!3m6!1e1!3m4!1ssRWHpRzclq4URr9zXPEIxg!2e0!7i16384!8i8192!5m1!1e1?hl=en).
If you include DC 295's exit 1 (https://www.google.com/maps/@38.87225,-76.9815471,3a,75y,253.35h,87.7t/data=!3m6!1e1!3m4!1sK7h-AlPPmI4lAQ2aReJ-Kw!2e0!7i16384!8i8192!5m1!1e1?hl=en) a couple miles further north, that's 3 within 10 miles.
Quote from: jmacswimmer on July 28, 2020, 01:17:21 PM
I-295 south in DC passes exit 1 for the US Naval research Lab (https://www.google.com/maps/@38.835249,-77.0120127,3a,75y,227.77h,87.8t/data=!3m6!1e1!3m4!1sbQwXxtTCXTabZCDYOOaRdA!2e0!7i16384!8i8192!5m1!1e1?hl=en), then 2 miles later crosses into MD and hits I-95/495 and the National Harbor at exits 1C-B-A (https://www.google.com/maps/@38.8010092,-77.0210617,3a,45.2y,158.81h,89.69t/data=!3m6!1e1!3m4!1ssRWHpRzclq4URr9zXPEIxg!2e0!7i16384!8i8192!5m1!1e1?hl=en).
If you include DC 295's exit 1 (https://www.google.com/maps/@38.87225,-76.9815471,3a,75y,253.35h,87.7t/data=!3m6!1e1!3m4!1sK7h-AlPPmI4lAQ2aReJ-Kw!2e0!7i16384!8i8192!5m1!1e1?hl=en) a couple miles further north, that's 3 within 10 miles.
National Harbor should really be Exit 0. And DC 295 should just continue with I-295's MMs and be Exit 5.
Springfield, IL has dual 96's. There's Exit 96 on I-72, just west of the south/west junction of the I-55/I-72 concurrency, and then there's Exits 96A-B on the concurrency itself, since it uses the mileage for I-55.
This isn't going to win the superlative by any means, but I-15 has an exit 8 in AZ and an exit 8 in Utah, too.
Quote from: paulthemapguy on August 05, 2020, 02:18:35 PM
This isn't going to win the superlative by any means, but I-15 has an exit 8 in AZ and an exit 8 in Utah, too.
It's okay, I'll take it. Despite the title of this thread, this wasn't really a contest to find the absolute closest exits with the same number. It was more a fun exercise to see how many instances in the system a route can have close exits with the same number, you know just to confuse the average motorist (hey, didn't we just pass Exit 8 a little while ago?)