Counties with no 4-way state highway intersections

[tdindy88]

Kalawao in Hawaii

Speaking of counties in Hawaii that actually have state highways, there should be three of them that don't have any 4-way state highway intersections:

Honolulu
Kauai
Hawaii

[sparker]

Three CA counties featuring zero 4-way SH intersections (or interchanges, for that matter) are Lake, Mendocino, and Trinity.  Humboldt would have joined that list except for a couple of instances where the US 101 freeway crosses its original alignment, now CA 254 -- which was retained in the state system to provide a scenic alternative through the area's redwood groves between Garberville and Pepperwood. 

[froggie]

Kalawao in Hawaii

Speaking of counties in Hawaii that actually have state highways, there should be three of them that don't have any 4-way state highway intersections:

Honolulu

If you consider Interstates as "state routes" (since they're maintained by the respective states), there are a number on Oahu.  Even not counting Interstates, there's the HI 76/HI 7101/HI 7110 interchange just south of I-H1.

Hawaii

HI 11/HI 2000 in Hilo.  2000 does extend east of 11.

[TEG24601]

Here's what I got for Washington:

   
• Skagit

I'm going to have to disagree with Skagit.  SR 20 and I-5 meet at an Interchange in Burlington, and all 4 directions are highways.

[webny99]

So do interstates and US routes count?
We are getting some examples that *technically* qualify because the only 4-way intersections between numbered routes involve an interstate or US route.

However, I think that defies the spirit of the thread. Instead, we could just assume for the purposes of this thread that we've already done a thread about counties with no 4-way interstate and US route intersections, and eliminated such counties from contention.
(Or someone could start such a thread to give us a basis for that assumption  )

[sparker]

So do interstates and US routes count?
We are getting some examples that *technically* qualify because the only 4-way intersections between numbered routes involve an interstate or US route.

However, I think that defies the spirit of the thread. Instead, we could just assume for the purposes of this thread that we've already done a thread about counties with no 4-way interstate and US route intersections, and eliminated such counties from contention.
(Or someone could start such a thread to give us a basis for that assumption  )

Actually, since Interstates and US highways are invariably the property of the state's DOT, it could be considered that all roads under state jurisdiction are state highways, regardless of posted signage.  That's definitely the case here in CA; which, if interchanges with four distinct state-owned legs are included, disqualifies a significant number of counties from the list. 

[US 89]

So do interstates and US routes count?

What counties do you know of that have no 4-way intersections or freeway interchanges where each leg is at least a state route?

[tdindy88]

Kalawao in Hawaii

Speaking of counties in Hawaii that actually have state highways, there should be three of them that don't have any 4-way state highway intersections:

Honolulu

If you consider Interstates as "state routes" (since they're maintained by the respective states), there are a number on Oahu.  Even not counting Interstates, there's the HI 76/HI 7101/HI 7110 interchange just south of I-H1.

Hawaii

HI 11/HI 2000 in Hilo.  2000 does extend east of 11.

Okay, I missed on Oahu.

As for HI 2000 on the Big Island the situation is a bit more ambiguous. Wikipedia both shows the highway as ending at HI 11 and further east at Railroad Avenue. Signage in the field seems to be very minimal, even along Puainako Street west of HI 11 there don't seem to be any HI 2000 shields. Heading north on HI 11 to the HI 2000 intersection it shows the highway as crossing HI 11. But from the north, it shows HI 2000 as just heading west from HI 11.

So the signage is confusing as to whether or not it really extends east of HI 11. Considering this is a temporary designation it may not matter much in the end.

[mapman]

Three CA counties featuring zero 4-way SH intersections (or interchanges, for that matter) are Lake, Mendocino, and Trinity.  Humboldt would have joined that list except for a couple of instances where the US 101 freeway crosses its original alignment, now CA 254 -- which was retained in the state system to provide a scenic alternative through the area's redwood groves between Garberville and Pepperwood. 

Add Alpine County to the list, too.  There are four three-way (4/207, 4/89 and 88/89 twice) but no four-way SH intersections.

[sparker]

Three CA counties featuring zero 4-way SH intersections (or interchanges, for that matter) are Lake, Mendocino, and Trinity.  Humboldt would have joined that list except for a couple of instances where the US 101 freeway crosses its original alignment, now CA 254 -- which was retained in the state system to provide a scenic alternative through the area's redwood groves between Garberville and Pepperwood. 

Add Alpine County to the list, too.  There are four three-way (4/207, 4/89 and 88/89 twice) but no four-way SH intersections.

A few more can be added to the list:  Sierra, Plumas, and Lassen Counties.  Sierra's not surprising; only two actual junctions in that county:  the CA 49/89 pair at each end of their multiplex.  NE CA is rife with multiplexes, largely due to the topology plus the presence of CA 89, which features no less than 7 multiplexes along its length (8 until the one with CA 4 was eliminated).