2 Numbered Highways going between the same 2 points.

[Bruce]

Washington:

I-5 and SR 99 between Fife and Everett
SR 99 and SR 509 between Des Moines and Seattle
I-5 and SR 529 between Everett and Marysville
I-5 and SR 11 between Burlington and Bellingham
I-5 and SR 121 around Millersylvania State Park
I-5 and SR 548 between Ferndale and Blaine
I-90 and SR 902 around Medical Lake
I-90 and SR 904 around Cheney
I-90 and SR 906 around Snoqualmie Pass
I-82 and SR 821 around the Yakima River Canyon
I-82 and SR 22 between Zillah and Prosser
US 12 and SR 124 between Burbank and Waitsburg
US 101 and SR 105 between Raymond and Aberdeen

[Avalanchez71]

Besides the obvious splits in Tennessee there are several other examples.

US 31 and US 431 Franklin to Nashville also I-65
US 41 and US 431 Nashville to Springfield
US 31A and US 431 Lewisburg to Nashville
US 31 and SSR 246 Columbia to Nashville also I-65
US 25W and US 441 Knoxville to Rocky Top (formerly known as Lake City) also I-75

[US 89]

Utah has several, mostly because our state highway system is full of loops and other routes that don’t really go in one direction in particular. A few examples, leaving out the super obvious ones like business loops and beltways:

I-15 and US 89, Sandy to Bountiful
I-15 and US 89, Farmington to Great Falls MT
I-15 and US 91, Brigham City to Virginia ID
I-15/84 and SR 13, Brigham City to Elwood
I-15 and SR 13, Elwood to near Plymouth
I-80 and SR 201, Lake Point to South Salt Lake
US 6 and US 50, Delta to Green River
US 6 and SR 198, Santaquin to Moark Jct
US 40 and SR 87, Duchesne to Ioka Jct
US 40 and SR 121, Roosevelt to Vernal
US 50 and SR 24, Salina to west of Green River
US 89 and SR 68, Woods Cross and Bountiful
US 89 and SR 114, Provo to Pleasant Grove
US 89 and SR 117, Spring City
US 89 and SR 137, Gunnison to near Sterling
US 89 and SR 147, Mapleton
US 89 and SR 186, downtown Salt Lake City to north of downtown
US 89 and SR 256, Redmond
US 91 and SR 252, Logan
US 189 (unsigned) and SR 32, north of Heber to Wanship
US 189 and SR 113, Charleston to Heber
SR 10 and SR 155, near Huntington to north of Cleveland
SR 23 and SR 142, Newton to Trenton
SR 37 and SR 108, Clinton to West Haven
SR 95 and SR 276, Trachyte Jct to near Fry Canyon
SR 108 and SR 126, Layton to West Haven

[TheHighwayMan3561]

MSP and Kansas City: I-35 and US 169

[roadman65]

OR 239 and OR 99.  The funny thing is OR 238 is signed E-W and OR 99 is signed N-S. Yet in Grants Pass where OR 238s western terminus is SB OR 99 is to the right which in normal case would be to the left. That's cause at it's west end OR 238 turns north and OR 99 comes in from the east to turn north at OR 238.

[jaehak]

Don't think anyone said 10 and 12 Baton Rouge to Slidell.

I-5 and 101 LA and Olympia

I 70 and US 40 and 24 all run through Topeka, Lawrence, and KC but don't all intersect in each.

Lots of examples with 70 and 40 or 70 and 24.

[7/8]

Ones I can think of for Ontario:
Highway 11 and 17 between North Bay and Nipigon
Highway 17 and 102 between Thunder Bay and Sistonens Corners
The 401 and 403 between Woodstock and Mississauga
The 403 and 407 between Burlington and Mississauga

[webny99]

NY 31 and NY 104 between Rochester and Niagara Falls. NY 18 also runs parallel for most of the way, but sadly it doesn't make it to Niagara Falls city proper.

The above could very well be the only example in the entire country where neither of the routes listed are the fastest route between those points. The fastest route is actually I-490 to I-90 to I-290 to I-190.

[DTComposer]

In California...

I-280 and US 101 between San Jose and San Francisco
Route 99 and I-5 between Wheeler Ridge and Sacramento
Route 60 and I-10 between Los Angeles and Beaumont
Route 154 and US 101 between Los Olivos and Santa Barbara
Route 85 and US 101 between south San Jose and Mountain View
Route 9 and Route 236 (former alignment of Route 9) north of Boulder Creek
Route 13 and I-580 between Oakland and Berkeley
Route 1 and US 101 along the coastline west of Ventura, and between Gaviota and Arroyo Grande, San Luis Obispo and San Francisco, and Marin City and Leggett
Route 33 and I-5 between I-5 Exit 349 and Exit 452

A couple of more California examples:

Route 158 and US 395 near June Lake
Route 36 and Route 172 (former segment of Route 36) between Mineral and Mill Creek
Route 193 and Route 49 between Auburn and Placerville
US 101 and Route 135 (former US 101) between Santa Maria and Los Alamos
Route 35 and Route 1 between San Francisco and Pacifica
Route 98 and I-8 between Ocotillo and I-8 Exit 143
Route 86 and 111 between Mecca and Heber
US 101 and Route 254 (former US 101) through Humboldt Redwoods State Park

Route 12 and Route 116 almost do this (but not quite, with a short segment of Route 121 between the two in Sonoma).  Another close-but-not-quite is Route 88 and Route 26 between Pioneer and Stockton, as well as I-10 and Route 111 between Cabazon and Indio.

Also-
CA-9 and CA-17 between Los Gatos and Santa Cruz
CA-99 and I-5 between Sacramento and Red Bluff

[SkyPesos]

The above could very well be the only example in the entire country where neither of the routes listed are the fastest route between those points. The fastest route is actually I-490 to I-90 to I-290 to I-190.

Considering how many highways are in the country, I don't think so. As an example I can think of right now, US 52 and US 421 both go between Indianapolis and Winston-Salem, but the fastest route is I-70>US 35>I-77>"I-74".

[webny99]

The above could very well be the only example in the entire country where neither of the routes listed are the fastest route between those points. The fastest route is actually I-490 to I-90 to I-290 to I-190.

Considering how many highways are in the country, I don't think so. As an example I can think of right now, US 52 and US 421 both go between Indianapolis and Winston-Salem, but the fastest route is I-70>US 35>I-77>"I-74".

Certainly. Not only did I figure there was probably more, I also figured the fastest way to find out would be to imply that there wasn't.

[KeithE4Phx]

Arizona DOT does not allow 2 numbered highways to travel between 2 points.
Example: at one time AZ88 and US60 both roads traveled from Apache Junction to Miami today only US60 travels between these Cities, AZ88 ends at Roosevelt at Jct AZ188.

One big violation is the Loop 202.  Not only is one end at I-10 at 55th Ave, and the other end is at I-10/AZ 51, but it crosses I-10 (and ended there until the South Mountain Freeway was opened a couple years ago) at the Phoenix/Chandler city limits just north of the Gila River reservation.  To make it "legal," ADOT would have to renumber either the Red Mountain Fwy or the Santan/South Mountain Fwy, between I-10 and US 60.

It's really a ridiculous rule that there is no reason to keep.

[KCRoadFan]

A 2-in-1 example: I-90 and I-94 from the latter's western terminus east of Billings, MT, to Tomah, WI - and then again from Madison, WI, to Chicago.

[SkyPesos]

A 2-in-1 example: I-90 and I-94 from the latter's western terminus east of Billings, MT, to Tomah, WI - and then again from Madison, WI, to Chicago.

3-in-1 actually. Also South side of Chicago to Lake Station, IN.

[bing101]

I-5 and CA 99 between Bakersfield and Sacramento.

I-5 and US 101 between Los Angeles and Olympia.

Another California example I-280 and US-101 from San Francisco to San Jose.
Or I-5 and I-405 from Mission Hills to Irvine.

[ztonyg]

Arizona DOT does not allow 2 numbered highways to travel between 2 points.
Example: at one time AZ88 and US60 both roads traveled from Apache Junction to Miami today only US60 travels between these Cities, AZ88 ends at Roosevelt at Jct AZ188.

One big violation is the Loop 202.  Not only is one end at I-10 at 55th Ave, and the other end is at I-10/AZ 51, but it crosses I-10 (and ended there until the South Mountain Freeway was opened a couple years ago) at the Phoenix/Chandler city limits just north of the Gila River reservation.  To make it "legal," ADOT would have to renumber either the Red Mountain Fwy or the Santan/South Mountain Fwy, between I-10 and US 60.

It's really a ridiculous rule that there is no reason to keep.

Not that it would ever happen, but I really think that if AZ 30 is ever built I-10 should be rerouted onto AZ 30 and the Papago Freeway and Red Mountain Freeway should be renumbered I-410 and the Santan and South Mountain Freeway should be renumbered I-610.

[KeithE4Phx]

Not that it would ever happen, but I really think that if AZ 30 is ever built I-10 should be rerouted onto AZ 30 and the Papago Freeway and Red Mountain Freeway should be renumbered I-410 and the Santan and South Mountain Freeway should be renumbered I-610.

The Durango route, which is now the Tres Rios Freeway alignment (AZ 30), was the original route planned for I-10 back in the 1960s.  That has been water under the bridge since about 1968, and it won't change.  It took long enough for it to be completed, given that Phoenix was once as anti-freeway as Tucson is now.

But as 3DIs go, ADOT is insistent to the point of being overly defensive that there will be NO 3-digit Interstates in the state of Arizona.  I'm surprised that they haven't taken it further, and reduced or eliminated most US highways in the state, similar to what California did in 1964.  Most of them are totally expendable.