Highest speed limit in a national park

[deathtopumpkins]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either.

90 doesn't enter Badlands.

94 does enter Theodore Roosevelt, and has been mentioned in this thread multiple times. The limit is 75.

[Max Rockatansky]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either.

90 doesn't enter Badlands.

94 does enter Theodore Roosevelt, and has been mentioned in this thread multiple times. The limit is 75.

I-94 is actually in Theodore Roosevelt for several miles even has a dedicated vista exit:

https://www.nps.gov/thro/planyourvisit/maps.htm

For some reason I thought the northeast entrance tip of Badlands boundary followed SD 240 to I-90, it doesn't. 

https://www.nps.gov/badl/planyourvisit/maps.htm

[dfilpus]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either. 

I-90 does not enter Badlands National Park.

I-94 is the southern boundary of parts of Theodore Roosevelt NP, so it is not really "in" a National Park.

[Max Rockatansky]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either. 

I-94 is the southern boundary of parts of Theodore Roosevelt NP, so it is not really "in" a National Park.

Yes, and even has a NPS Vista which is accessible directly from I-94.  It very much clearly is aligned through the park.  You actually travel over I-94 from Medora to get into the south annex.  You could make that same semantic argument about I-40 in Petrified Forest. 

[US 89]

I don't know how accurate OSM's boundaries are, but they show I-94 unambiguously entering the park boundaries between exits 25 and 27:

https://www.openstreetmap.org/#map=14/46.9265/-103.5235

[Max Rockatansky]

I don't know how accurate OSM's boundaries are, but they show I-94 unambiguously entering the park boundaries between exits 25 and 27:

https://www.openstreetmap.org/#map=14/46.9265/-103.5235

I posted the actual park map above somewhere.  I-94 is decidedly in the park boundary and interacts with it far more than I've seen with other Interstates. 

[RobbieL2415]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either.

90 doesn't enter Badlands.

But Halsey does.

[deathtopumpkins]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either.

90 doesn't enter Badlands.

94 does enter Theodore Roosevelt, and has been mentioned in this thread multiple times. The limit is 75.

I-94 is actually in Theodore Roosevelt for several miles even has a dedicated vista exit:

https://www.nps.gov/thro/planyourvisit/maps.htm

[stevashe]

What about I-90 through Badlands and I-94 through Theodore Roosevelt?  I've been to both and I can't recall what the speed limit was on either.

It's too bad that I-90 doesn't enter Badlands since it does appear to have a speed limit of 80 when passing by it!

[GenExpwy]

How about Zion N.P. at I-15 exit 40? OpenStreetMap says the northbound exit ramps, but not the mainline, are in the park. Google Earth shows the park boundary in the median of I-15, so the northbound lanes would be inside the park.

[Bruce]

A section of US 101 in Olympic NP is signed for 60 mph. WA 20 in North Cascades and WA 410 both have 55 mph sections in their respective parks.