Easy list to be found here, though it doesn't call out the two spurs independently
https://www.pikepass.com/about/FAQs.aspxClick on
5. How many turnpikes are on the turnpike system?This lists the 2 spurs, and also an additional pike not on the Toll Rates list: the Gilcrease Expressway. So that's OTA jurisdiction, is it? Righto.
https://oklahoma.gov/content/dam/ok/en/ota/documents/other/5%20Year%20Capital%20Plan.pdf has 19 occurrences of "Gilcrease".
Some of the descriptions & mileages need a little unraveling...
Turner Turnpike, 86.0 miles in length, connecting Oklahoma City with Tulsa.
If I divide WPTedit's 87.80 mi at (@
221) by the CHM fudge factor of 1.02112, I get 85.98 mi. OK, sounds like 86.0 to me! Moving on...
221 looks like the right endpoint per
the map linked above. It's also where OSM shows the changeover to Skelly Bypass.
Will Rogers Turnpike, 88.5 miles in length, extends from Tulsa to the Oklahoma-Missouri state line.
Within range of the fudge factor. Looks good.
Oddly, this section of I-44 has
ONE EXIT not fitting the I-44 mileposts for whatever reason
(Thanks, Oklahoma), labeled
35(WRT).
So I guess that would mean WillRogTpk having one exit
35, with everything else switching to
248(44) format.
This route passes through c
raIG c
oun
ty some 35-36 mi away. Just sayin'.
H.E. Bailey Turnpike, 86.4 miles in length on main route, extending from Oklahoma City just north of the Texas state line, and 8.2 miles on a spur connecting the main route to S.H.9.
Emphasis on
just north of.
The map shows a transition to free I-44 at Exit 5, where US 277 & 281 leave the Interstate.
A south end here gives us 102.4 mi in the HB. Subtract out the 16 mi for the free Pioneer Expy, exits 30 to 46, and we get 86.4 mi. Woot!
nor does it call out the fact that three of those turnpikes each exist in two separate sections.
OK, I see what you mean now. Here's one of them.
Here's where I start to have misgivings about usaokt. There's already a lot of duplication of active routes. Having multiple segments of a single named turnpike, both already concurrent with the same "parent" active route, adds another later to it. Ugly, clutter. And some users might find it confusing.
Indian Nation Turnpike, 105.2 miles in length, connects Henryetta at I-40 to U.S. 70 near Hugo.
Within range of the fudge factor. Looks good.
Muskogee Turnpike, 53.1 miles in length, connecting Webbers Falls at I-40 with Tulsa.
OK351 is 55.3 mi after accounting for $CHMFUDGE. Too Long.
How about ending at the beginning of OK165, where the
free segment and
unnumbered exits begin?
56.43 - 4.1 mi (per wptedit) = 52.3. Too short.
How about the US62 interchange? 56.43 - π mi (per wptedit) for 53.29? That's within $CHMFUDGE.
FWIW, OSM labels "Muskogee Turnpike" this far south, ending at the US62 interchange, resuming south of OK165.
Why here?
Worth noting that before MusTpk became an AltRouteName for OK351, it was all in the HB as one continuous route.
Is it one route? Checking Wiki
[citation needed]pedia, the implication looks like one continuous route, with an OK165 overlap.
This is starting to look like enough of an
indeterminus...
Here again we have the multiple-segments-on-the-same-active-route mess, now compounded by where exactly it should be split, or if we even should at all.
Cimarron Turnpike, 59.2 miles in length on main route, extending from I-35/ U.S. 64 east of Enid to Tulsa,
within $CHMFUDGE
and 8.5 miles on a spur connecting the main route with Stillwater and Oklahoma State University.
Maybe OTA includes more of the length of the ramps that don't get reflected in the HB, which shows 7.55 mi.
John Kilpatrick Turnpike, 25.3 miles in length, extending from the Oklahoma City interchange of the Turner Turnpike and I-35 to I-40 between Mustang and Sara Road.
Within $CHMFUDGE of the
old route before the extension.
In January 2020 the JKT Extension, 5 miles, between I-40 and State Highway 152/Airport Road opened.
C'mon guys. If you're gonna update your page, update your page.
Cherokee Turnpike, 32.8 miles in length, extends eastward from U.S. 412 at Locust Grove to U.S. 412 west of West Siloam Springs.
32.70 mi per wptedit. OK sure.
Creek Turnpike, 34.4 miles in length, connecting the Turner Turnpike to the Will Rogers Turnpike.
Google shows 33.8 mi for OK364, if I include the ramp at the SW end.
This would suggest there's no mileage subtracted out for the free US64/169 concurrency.
Though
signage at Memorial points only
west (maybe call it an aid to help drivers realize this segment is free?),
this should at least put us back in "implied concurrency" territory. Just one Creek Turnpike segment.
Chickasaw Turnpike, 13.3 miles in length, extends southward from S.H. 3 near Ada to S.H. 7 immediately west of Sulphur.
They mean S.H.
1 near Ada. Another "is it updated or not?" entry -- it
originally ended at S.H. 7 immediately west of Sulphur; later, the section W of US177 was transferred to
OK7SprSul, and is no longer signed as Chickasaw Turnpike. 13.3 mi matches the truncation to US177. Or maybe it's just another "minus the free bits" figure...
Kickapoo Turnpike, 18.5 miles, links I-40 and I-44 (Turner Turnpike) in Eastern Oklahoma County. The northern section of the Kickapoo Turnpike, from I-44/Turner Turnpike to NE 23rd/SH62, is open for travel. The southern section of the Kickapoo Turnpike, from NE 23rd/SH62 to I-40, will open in early 2021.
They mean
US62. Mileage within $CHMFUDGE for entire route, I-40 to I-44.
Gilcrease Expressway, 5.7 miles, connects L.L. Tisdale to I-44 and completes the Western loop around the Tulsa metro area. Scheduled to open mid 2022.
Not to be confused with
Gilcrease Expressway, 8.13 miles, connects L.L. Tisdale to I-244 and completes the Northeastern loop around the Tulsa metro area. In the HB since CHM.
5.7 mi gets us a tiny bit more than the SW quadrant from I-44/244 to US64/412 shown under construction in OSM & ESRI, but falls plenty short of it getting us to the Tisdale.
And on that note...
Once the NW quadrant is completed, it will beg for the other 2 segments to be connected. And we don't need another Palisades Interstate Parkway vs. usanyp scenario.
The existing segment is free, and doesn't belong in usaokt.
If usaokt doesn't exist, then the Gilcrease would all clearly belong in usasf, no problem!
This fact puts me just over the edge into no longer favoring usaokt. 
