Exit numbers that jump routes

[NE2]

The Hot Springs, AR bypass has continuous (mile-based) exit numbers, but the west part is US 270 only and the east part of US 70 only (with an overlap in between). Are there any other roads like this (not counting named roads with their own shield, e.g. Ohio Turnpike or Henry Hudson Parkway, or places where one route ends and the other begins, e.g. I-255/IL 255 if those exit numbers were continuous)?

[hotdogPi]

I-395/290, Massachusetts

[dgolub]

I-87/I-90 in New York
I-95/NJ 700 in New Jersey
I-80/I-95 (sort of) in New Jersey
Cross Island Parkway/Belt Parkway in New York
Grand Central Parkway/Northern Parkway in New York
FDR Drive/Harlem River Drive in New York

[corco]

Would the alphabet soup loop interchanges in Kansas City count? I tend to think they do.

[Mapmikey]

Virginia used to have two examples:

I-85/I-95 on the Richmond-Petersburg Tpk
I-95/I-495 on the Capital Beltway

South Carolina does this with US 176 and I-585 using US 176's mileage.  There is a numbered interchange north of where I-585 ends.

Mapmikey

[Beeper1]

Hutchinson River Parkway / Merritt Parkway (sort of)

[NE2]

not counting named roads with their own shield, e.g. Ohio Turnpike or Henry Hudson Parkway, or places where one route ends and the other begins, e.g. I-255/IL 255 if those exit numbers were continuous

In other words, 1's, dgolub's, and Beeper's don't count (I-80/95 is coincidence). The Virginia examples fit the spirit of named roads with their own shields, even if these were not signed as prominently as the Interstates. I-585 is numbered based on US 176's mileage.

Kansas City is a reasonable example (same for the old numbering on I-71/75 in Cinci).

[jp the roadgeek]

I-95/ I-395 CT (For now).  NY Thruway at Exit 24 (I-87/ I-90)

[Eth]

It looks like the freeway bypass in Albany, GA counts.

- Sequential exit numbers from 1 (southeast) to 8 (northwest)
- Starts from the south as US 19/GA 3/GA 300
- US 82/GA 520 join and GA 300 leaves at exit 3
- US 19/GA 3 leave at exit 6
- Continues past west end of freeway as US 82/GA 520

[lordsutch]

I-240 in Memphis today continues I-40's (now messed up) exit numbers, although of course originally they were I-240's exit numbers.

The Liberty Expressway in Albany, GA has continuous (sequential) exit numbers but doesn't carry the same route number throughout. (Eth beat me to it.)

This is somewhat common in parts of Europe; in England:

The A11 spur off the M11 continues the M11's exit numbering (albeit just one junction) and the A1081 spur off the M1 does the same.
The M60's exit numbers fit into those of the M62, because originally the northern part was the M62.
Perhaps the oddest case is the M26 seemingly having its only exit number (2A) based on those of the M20.

In France continuous numbering seems somewhat common when routes fork:

The A2 continues the exit numbers of the A1.
The A21 continues the exit numbers of the A26.
The A9 continues the A7's exit numbers independently of the A7.
The A750 continues the A75's exit numbers.

But this isn't exactly universal either.

(England's M25 / A282 would seem to fall under NE2's one begins/other ends exception, as would the A42 continuing the M42's junction numbering.)

[WNYroadgeek]

I-390/NY 390, I-590/NY 590, and I-481/NY 481 each share a continuous set of exit numbers also.

[NE2]

It looks like the freeway bypass in Albany, GA counts.

Indeed, it does.

[empirestate]

I-390/NY 390, I-590/NY 590, and I-481/NY 481 each share a continuous set of exit numbers also.

Those are continuous routes; they don't count. A couple people have mentioned the Thruway, which also doesn't count, being a continuous shielded route in its own right. It's all in the OP.

[Brandon]

I-270/I-70 in Illinois.  I-70 leaves I-55 and follows I-270 mileposting and exit numbers.  This has the strange effect of having Exit 21 six miles east of Exit 20 for I-70.

[jp the roadgeek]

How about the 80/76 bump in Youngstown where 80 keeps its exit numbers exiting the turnpike and 76 inherits 80's numbers entering?

[pianocello]

How about the 80/76 bump in Youngstown where 80 keeps its exit numbers exiting the turnpike and 76 inherits 80's numbers entering?

(not counting named roads with their own shield, e.g. Ohio Turnpike or Henry Hudson Parkway...)

But yeah, it would count if it wasn't specifically discounted in the OP.

[english si]

NB: the mainline motorways do not restart numbers with these examples. The exit numbers don't jump so much as fork with these.

The A11 spur off the M11 continues the M11's exit numbering (albeit just one junction) and the A1081 spur off the M1 does the same.

And the A404(M), A48(M) and A601(M). Only M1 J10A wasn't an original terminus (though it was the end of the St Albans bypass, with J10 being the start of the 'London-Birmingham motorway': the two schemes remained functionally separate despite opening the same day) - the others were all where the road ended at one point.

M55 J1 used to be M6 J32A and M32 J1 used to be M4 J19A.

The M60's exit numbers fit into those of the M62, because originally the northern part was the M62.

Though they did renumber the junctions - junction 16 was never built and there was a junction 14A. 14A became 15 and 15 became 16.

Perhaps the oddest case is the M26 seemingly having its only exit number (2A) based on those of the M20.

Part of that was because it was M20 J2 before the M20 extension to London was built. You can (just about) see where the road was three lanes wide there. They added the 'A' so as to not cause confusion with J2 up the road.

Oh, and (unsigned) the M20 junction is 3, and the M25 junction is 1, so it isn't the only exit number on the M26. Unless you want to get silly and French and not count interchanges between motorways as exits unless there's access to surface roads (and thus don't warrant a number).

In France continuous numbering seems somewhat common when routes fork:

They love it!

The A8 also uses the A7's numbering (one you missed of the top of my head). Oddly the A7 doesn't follow the A6's numbering and the A75 doesn't follow the A71's numbering despite the routes ending head on.

---

Finland, despite not following the Scandinavian practise of E-roads being national routes, have one exit numbering pattern for the E18 (the only one that is nearly all freeway). Vt1, Kt50 around Helsinki and Vt7 use E18 sequential exit numbers (with the rump bit of Vt1 in Helsinki having exit numbers in the 40s, when they ought to be in the 30s if continuing E18's pattern). But that obviously has its own shield...

[Mapmikey]

not counting named roads with their own shield, e.g. Ohio Turnpike or Henry Hudson Parkway, or places where one route ends and the other begins, e.g. I-255/IL 255 if those exit numbers were continuous

In other words, 1's, dgolub's, and Beeper's don't count (I-80/95 is coincidence). The Virginia examples fit the spirit of named roads with their own shields, even if these were not signed as prominently as the Interstates. I-585 is numbered based on US 176's mileage.

Kansas City is a reasonable example (same for the old numbering on I-71/75 in Cinci).

Fair enough.  I didn't remember at first a current Virginia example that is the same as the Hot Springs AR example:

The Lynchburg Expwy exit numbers start at the James River heading SB on US 29 Bus.  US 501 joins the Expwy at Exit 8.  US 29 Bus leaves at Exit 9.  US 501 continues around on the Expwy with exit numbers up to 11.

Mapmikey

[roadman65]

If Bainbridge, GA's bypass freeway had numbers, it would count as its starts from the North as US 27, then picks up US 84 for a short concurrency and then 27 leaves the freeway having US 84 continue the rest of the freeway before it becomes non freeway US 84 heading east.

As I do understand the OP talks about one particular freeway with two completely different routes at each end of it having the same scheme for both route numbers on the facility excluding shielded toll roads like the NYTA or KTA.

[NE2]

Wouldn't the Kansas Turnpike Count?

[SSOWorld]

When not piggy-backing I-90,  I-39 uses US-51 mileposts even in it's 5-mile alone part (which had been used for WIS-78) through Wisconsin. so obviously - the numbering scheme continues north of where I-39 does not.  As IL didn't sign its non-interstates, the portion there is true to I-39.

US-45 and US-41 miraculously "share the same mileposts" as they split north of Richfield (WI) the sequence stays the same along US-45 in Milwaukee when US-41 splits off to Appleton Ave.

[ztonyg]

Wouldn't the Kansas Turnpike Count?

Sorry, my error about that one.

[Bickendan]

BC 1->3->5->1
Bonus: BC 97 has a long wrong-way overlap on BC 1 and on BC 1 & 5 through the exit number series.

This one also doesn't violate the named highway condition: BC 1 (TCH), BC 3 (Crow's Nest Highway), BC 5 (Coquihalla Highway, Yellowhead South), BC 97 [TCH transition between Okanagan and Caribou Highways]

Bonus 2: Exit number start and end on BC 1, but follow the shorter route from Hope to Kamloops, forcing a kilometer reset on BC 1 at BC 5. Most likely, BC 1 uses BC 97's mileage (is there an equivalent term for kilometers that's not clunky?) between the Caribou Highway and Coquihalla Highway.

Bonus 3 (Speculation): If this exit on BC 5 at BC 1/97 were numbered, it could be a forked exit number -- that is, 374 like on the mainline freeway.