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[Verlanka]

I wonder why nobody has thought about just realigning 90 onto the Thruway, then having it take over the whole of the Berkshire Connector?

Probably because the designers thought I-90 should have a non-toll section in NY.

[SeriesE]

Northbound I-5, San Diego Freeway exits itself at I-5/I-405 onto I-405.
I-280 north at CA-1 north (19th Avenue) San Francisco
I-5 at I-580
I-10 in Downtown Los Angeles, twice. The through movements go to CA-60 (eastbound) or San Bernardino Freeway/US-101 (westbound)

[Thing 342]

VA-286 (Fairfax County Parkway) exits off itself eastbound at VA-289 (Franconia-Springfield Parkway).
DE-1 Northbound at US-13 in Bear.
I-264 eastbound at Waterside Drive, largely due to the interchange predating the interstate, IIRC.
US-13 SB at the start the Suffolk Southern Bypass, with the through route (US-58) no longer a freeway.

[cwf1701]

I-96 and M-5 at the I-275/I-696/M-5 interchange.

[webny99]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

I wonder why nobody has thought about just realigning 90 onto the Thruway, then having it take over the whole of the Berkshire Connector?

Nope, nobody at all. It's only been discussed to death in the Northeast and Fictional Highways boards. 
I'm a major advocate - this should have been done yesterday. Current free I-90 can be renumbered as I-390 once I-83 (or I-99) makes it to Rochester!

[Roadgeekteen]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

It looks like I-390 is the through route.

[Ketchup99]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

I wonder why nobody has thought about just realigning 90 onto the Thruway, then having it take over the whole of the Berkshire Connector?

Nope, nobody at all. It's only been discussed to death in the Northeast and Fictional Highways boards. 
I'm a major advocate - this should have been done yesterday. Current free I-90 can be renumbered as I-390 once I-83 (or I-99) makes it to Rochester!

Since the fastest route is the free road, shouldn't that stay I-90? I'm not sure it needed to be built but since it was, one would think it deserves the I-90 designation.

[Roadgeekteen]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

I wonder why nobody has thought about just realigning 90 onto the Thruway, then having it take over the whole of the Berkshire Connector?

Nope, nobody at all. It's only been discussed to death in the Northeast and Fictional Highways boards. 
I'm a major advocate - this should have been done yesterday. Current free I-90 can be renumbered as I-390 once I-83 (or I-99) makes it to Rochester!

Since the fastest route is the free road, shouldn't that stay I-90? I'm not sure it needed to be built but since it was, one would think it deserves the I-90 designation.

The fastest route is the toll road.

[webny99]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

It looks like I-390 is the through route.

Yes, but it's because of the design of the interchange. It could have easily been designed a bit differently to make I-86 the through route. That's not the case with most other examples, where the route clearly exits onto a different road.

[csw]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

It looks like I-390 is the through route.

Yes, but it's because of the design of the interchange. It could have easily been designed a bit differently to make I-86 the through route. That's not the case with most other examples, where the route clearly exits onto a different road.

The I-86 sign has up arrows, it takes a flyover, it uses the right lane, it's marked on signs farther back as "I-86, next right"...I don't know what else you want. It exits itself.

[Hwy 61 Revisited]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

It looks like I-390 is the through route.

Yes, but it's because of the design of the interchange. It could have easily been designed a bit differently to make I-86 the through route. That's not the case with most other examples, where the route clearly exits onto a different road.

The I-86 sign has up arrows, it takes a flyover, it uses the right lane, it's marked on signs farther back as "I-86, next right"...I don't know what else you want. It exits itself.

It does feel somewhat odd when highways switch which lanes they take. If I-99 were extended to Rochester, it would start on the slow lane then move into the fast lane.

[webny99]

The I-86 sign has up arrows, it takes a flyover, it uses the right lane, it's marked on signs farther back as "I-86, next right"...I don't know what else you want. It exits itself.

It goes from Southern Tier Expressway to... Southern Tier Expressway. It's the same road on both sides of the interchange, it just happens to pass through an interchange that's designed a bit differently than your standard directional T. A minor blip in an otherwise consistent through route.

[sprjus4]

Westbound I-86/NY 17 at I-390

Hmm. I'm not sure I'd count that. It does look like an "exit", but it's just because of how the interchange is configured, it's not really exiting itself in the traditional sense of exiting onto a different roadway.

It looks like I-390 is the through route.

Yes, but it's because of the design of the interchange. It could have easily been designed a bit differently to make I-86 the through route. That's not the case with most other examples, where the route clearly exits onto a different road.

I-390 becomes the through route on the first freeway, and I-86 exits itself onto another freeway to continue west towards I-90.

[sprjus4]

The I-86 sign has up arrows, it takes a flyover, it uses the right lane, it's marked on signs farther back as "I-86, next right"...I don't know what else you want. It exits itself.

It goes from Southern Tier Expressway to... Southern Tier Expressway. It's the same road on both sides of the interchange, it just happens to pass through an interchange that's designed a bit differently than your standard directional T. A minor blip in an otherwise consistent through route.

All of the other examples that exit themselves keep the same name. For the I-80 / I-76 example, they are both I-80 and I-76 on their respective facilities even after exiting. For the Fairfax County Parkway example, it continues as such even after exiting.

[hockeyjohn]

Several in the Indianapolis area due to the general lack of State highways inside I-465 (presently only I-65 and I-70) and included are only the ones where the exit ramp is at something akin to full speed and where no traffic lights are present at the junction:

• SR-37 is part of I-69's Exit 0 onto I-465 south on the northeast side of town while Binford Blvd is the through road
• US-31 exits onto I-465 east on the southside of town with East Street being the continuation
• I-74 technically exits itself onto I-465 west on the eastside with Southeastern Ave continuing but the construction project a while back indicates Southeastern Ave now as Exit 94.   The ramp speed on I-74 is less than proceeding on Southeastern Ave, however.

[dvferyance]

I-55 NB in Memphis really bad you have to take a cloverleaf ramp to stay on I-55. Also I-75 NB in Lexington you have to exit to stay on 75 the mainline continues as I-64.