Numbered highways that must exit freeways to continue

[ErmineNotyours]

I'm a new member and taking in all the forums in a short time.  I saw this topic mentioned somewhere here, but never found the actual thread.  If it exists, it's too old to continue anyway.

Notice that in Washington State, the mileage continues on the bridge over/under the same intersecting highway, and not down the enter/exit ramps, which would vary depending on direction. Not included are multiplexes that enter/exit a more dominant freeway.

Washington State:

SR 422 at Tennant Way: West 422 must exit or it continues as Tennant Way, a City of Longview street. This interchange is at the south end of SR 411, and itself soon ends at the short SR 433, the Lewis and Clark Bridge over the Columbia River.  Diagram  Google Maps

US 101 at SR 8: Northbound 101 must exit or continue as SR 8.  Southbound 101 narrows to one lane and becomes an on ramp.  Diagram

SR 7 at S 38th Street: This is the end of a stub built as part of the Intersate 5 project.  The proposed freeway would have gone to Parkland before rejoining surface SR 7.  There is also a diamond-shaped patch of trees visible on Google Maps that was to be the cloverleaf interchange with SR 512, but the freeway is now so abandoned that someone has built condos just south of where the freeway would have gone through.  Diagram

SR 509 at Des Moines Way South: Southbound traffic missing the exit continues on past the south end of Sea-Tac Airport. Temporary end pending new freeway construction  Diagram

SR 99 at First Avenue Bridge: At the north end of the freeway, north traffic must wait at a left turn light and then use an on ramp to the bridge.  South 99 must exit from near the north end of SR 509 and make a nearly complete helix before waiting at the light for north 99 turns.  Diagram

SR 504 at Coldwater Ridge Visitor Center, near Mt. St. Hellens.  This one puzzles me.  I've never been there, but I don't see why this interchange exists unless there is steep terrain or high volumes expected.  Eastbound 504 must exit or continue to the visitor center, though there is a second chance left turn available.  Westbound uses the cloverleaf, which is part of the official highway mileage.  Diagram  Google Maps

No longer qualifies:

SR 99 at SR 599 and Marginal Way East:  South traffic used to have to exit to Pacific Highway South/International Boulevard or continue as 599.  Now 99 has been deleted south of here to the junction with SR 518, with no listed or official multiplexing.  Diagram

Oregon:

I-5 at I-405 (south end) and Harbor Drive.  South I-5 exits on a flyover, while left lanes continue on as I-405.  North I-5 exits while left lanes continue as Harbor Drive.  I-5 alignment was planned as being on the west side of the Willamette River.  Though the removal of that freeway is much celebrated by Portland residents, I-5 still dominates the east side of the river. Google Maps

I-84 westbound at I-205: left lanes continue as I-205.  This was in anticipation of the canceled Mt. Hood freeway. Google Maps

[Max Rockatansky]

CA 1 jumps on and off US 101 a ton of times during the full course of its routing.  Near me CA 63 jumps on the CA 198 Freeway for less than a mile rather than using surface streets. 

[CrystalWalrein]

Low-hanging fruit: US 40 with I-70 and US 30 with I-80 (the interstates largely supplanted the US Highways outside major urban areas). US 9 and the Garden State Parkway have a similar relationship from Toms River south.

However, what first came to mind were OH 16 and OH 37. OH 16’s freeway goes on as OH 161 west of Granville. US 41 off Lake Shore Drive also qualifies.

[oscar]

This is so common a situation as to have its own acronym: TOTSO (Turn Off To Stay On), which applies also to routes exiting a freeway to continue on another freeway.  Two examples of many:

FL 826 does this in Miami Gardens, within the complex Golden Glades Interchange, connecting between the Palmetto Expressway and NW 167th St.

AK 1 leaves the freeway east of Wasilla to continue as a non-freeway to Palmer and beyond. The freeway continues to Wasilla and beyond as AK 3.

[ErmineNotyours]

I remembered another one.  Where the Trans-Canada Highway leaves the freeway eastbound approaching Hope, there is actually a sign, "Trans-Canada Highway Leaves Freeway Next Exit" Otherwise it continues on to PR 3, and to an optional toll highway to Kamloops.

[GaryV]

There are places in Michigan where a state highway joins a freeway for a while, and then exits again.  Examples:
M-55 in mid-state (I-75)
M-37 in Grand Rapids area (I-96)
M-46 north of Grand Rapids (US-131)
M-66 in Battle Creek (I-194)

Is that the kind of thing you are looking for?

[US 89]

UT-201 exits the 201 Freeway at 900 West and jogs over to 2100 South. Prior to the Olympic reconstruction, there was a direct connection between 2100 South and the freeway, so both portions were designated SR-201 (actually, that designation pre-dates the freeway). That connection was removed, leaving 201 as a discontinuous route requiring an implied connection on 900 West.

I'm not sure if this counts as a freeway, but US 85 must use an exit to leave CO 115 south of Colorado Springs. 85 isn't signed, and the exit number is based on 115 mileage.

Powers Blvd and Platte Ave in Colorado Springs is another. The junction is set up with Powers as the freeway mainline, but eastbound 24 must exit to eastbound Platte Ave to continue. Northbound Powers continues as CO 21.

[ilpt4u]

I'm just going to say: I-74 and every US and IN route that goes around Indy on the I-465 Beltway

[Kulerage]

Thanks to all the new freeways here, this is common in North Carolina. US 64 and 1 both join I-40/440 and they both take exits off of the freeway. Extreme examples are US 19, 23, 25 and 70 on I-26, and US 29, 70, 220, and 421 on the 50 million Interstates in Greensboro.

[wxfree]

San Angelo, Tx has three of these on its two freeways.  The main freeway runs from northeast to southwest on the north side of town and then curves around to the southeast on the south side.  US 67/277 enters town on the freeway from the northeast.  US 277 exits the freeway and joins US 87 to run south through town along the main road.  US 67 exits the freeway to continue southwest where the freeway curves around and becomes Loop 306.  That part of the freeway runs southeast to US 87/277, which is on another, short, freeway that continues south and onto a short stretch of US 87 and Loop 306 after US 277 exits from that freeway.

[Techknow]

CA 1 jumps on and off US 101 a ton of times during the full course of its routing.

CA 1 also exits off of I-280 at Daly City right before it enters San Francisco (and that's the penultimate exiting before it exits US 101 at Mill Valley for the last time going North!)

Several state highways in California also join US 101 in a concurrency while it is a freeway and eventually exit, I have traveled on CA 84, 128, 152, and 156 where that occurs.

[cpzilliacus]

Low-hanging fruit: US 40 with I-70 and US 30 with I-80 (the interstates largely supplanted the US Highways outside major urban areas).

U.S. 40 also shares a fair number of miles in Western Maryland with I-68, after it leaves I-70 near Hancock.  It runs concurrent with I-68 for about 67 miles to Keyser's Ridge, where it exits the freeway, and then runs roughly northwest in the direction of Uniontown, Pennsylvania, eventually  returning to U.S. 40 near Washington, Pennsylvania.  I-70 and U.S. 40 stay relatively close from there as far west as Colorado, where they separate for the last time west of Denver.

[ibagli]

However, what first came to mind were OH 16 and OH 37. OH 16's freeway goes on as OH 161 west of Granville.

That whole situation is going to get even sillier once all the exits are numbered (right now only three are in Licking County). I think there's probably going to be a stretch of exits numbered something like 57-105-27.

[Anthony_JK]

I don't know whether this would qualify, but...

When US 167 was converted to I-49 between Lafayette and Opelousas, the original plan was for 167 to follow the original path through Opelousas, entering concurrent with US 190 via the Landry St./Vine St. couplet, then turning north via the Union St./Main St. couplet to Church St., and then out of O-Town through Main Street on to Nuba. From Opelousas to the community of Nuba, 167 would follow LA 182, but at Nuba 167 would turn west (left) on its way to Ville Platte with LA 10 West, while LA 182 would continue straight north with LA 10 West to Washington.

However, when US 167 was freewayized as part of I-49, LADOTD decided that the best means to resolve routing 167 was to extend it along the newly constructed I-49 a bit to the north for about 4 miles to a new interchange with a new road extending straight west from there to the US 167/LA 10/LA 182 intersection near Nuba. That roadway got the US 167 designation, along with the 4 mile "extension" along I-49 from Opelousas north (of course, the concurrency extends south to Lafayette); while the run through the city via 190 and 182 was removed.

That's probably the only example of leaving a freeway I know as of right now.

[bzakharin]

US 1&9 exit the Pulaski Skyway which continues as NJ 139. The northern terminus of the short US 202/206 freeway has the freeway become an on-ramp to I-287 while 202/206 themselves exit it. NJ 42's freeway section pretty much flows into the beginning of the Atlantic City Expressway, though the continuation of NJ 42 is not presented as an exit, but a 50/50 split. I'm not including US and state routes which hitch a ride on Interstates / toll roads as that would be a very long list.

[Eth]

The north end of the freeway portion of GA 141 is presented as a 50/50 split, but based on ramp topography I think you can make an argument that the continuation of 141 is a left exit. Google agrees, marking 141 as a ramp and Peachtree Industrial as the mainline.

[US 89]

The I-15/84 interchange in Tremonton, UT might qualify. I-15 is presented as the major road on the 15/84 overlap, and exit numbers are based on I-15. However, the actual junction is set up as a trumpet interchange with I-84 as the mainline.

The signs leading up to the interchange show the I-84 mainline as a left exit 379, a number based on I-15 mileage. (The diagrammatics on these signs are wrong, but that's another story.) But when you get up to the actual split, the BGS there has no exit numbers at all, and the exit sign in the gore shows I-15 taking its own exit 379.

[NWI_Irish96]

Several in Indiana:

US 6 is multiplexed with I-80/94 between IL 83 and IN 51 so you must get on/off a freeway to follow US 6
US 41 is multiplexed with I-80/94 between Calumet Ave and Indianapolis Blvd so you must get on/off a freeway to follow US 41
US 20 westbound exits the South Bend bypass
IN 331 is multiplexed with US 20 between Bremen Hwy and Elm Rd. so you must get on/off a freeway to follow IN 331.
US 31, US 36, US 40, US 52, US 421, IN 37 and IN 67 all multiplex with I-465 and require getting on/off freeways to follow.
US 24, US 30 and US 33 all multiplex with I-469 and require getting on/off freeways to follow.
IN 62 requires getting on/off freeways to follow around New Albany/Jeffersonville

[ftballfan]

I-96 exits itself once in each direction in the Grand Rapids area. Eastbound, I-96 goes off to the left while (unsigned) I-296 continues straight just east of Alpine Ave. Westbound, I-96 goes off to the right while I-196 continues straight ahead just west of East Beltline Ave.

Speaking of I-96, M-37 exits off it at Alpine Ave westbound and at East Beltine Ave eastbound.

[jp the roadgeek]

Connecticut has so many of these:

US 1 twice with I-95.  Once to cross the Connecticut River on the Baldwin Bridge, and again toncross the Thames on the Gold Star Bridge.

US 5 leaves CT 15 in East Hartford just north of the Charter Oak Bridge.

US 6 3 times with I-84.  Danbury-Bethel, Newtown-Southbury, and Farmington-Manchester.  US 6 also briefly piggybacks on the CT 8 expressway in Thomaston.  It also exits itself at the east end of the Willimantic bypass.

CT 2A exits I-395 to form its own brief expressway past Mohegan Sun.

CT 17 with CT 9 in Middletown. South end has a brief CT 17 expressway.

US 44 for about a half mile with I-84 (and US 6) to cross the Bulkeley Bridge.

US 202 with I-84 (and US 6 and 7) and a small piece of US 7 in Danbury.

CT 32 exits the CT expressway in Norwich westbound after duplexing through Norwich.

The 8/25 split is debatable which leaves which.

Couple I can think of in RI: US 6, US 44, and US 1A with I-195.  US 6 with I-95, and US 6 on the c/d roads of I-295.  Also a brief US 1 overlap with I-95 in Pawtucket.

[Rothman]

There had to be a thread on m.t.r that covered TOTSOs.

[SSR_317]

I'm just going to say: I-74 and every US and IN route that goes around Indy on the I-465 Beltway

Technically that's not true for I-74 since both junctions (SE Side & in Speedway) are freeway-to-freeway for both directions of travel. Also, it is not true for US 31's north junction (uses the new US 31 Fwy), US 52's north junction (multiplex on I-865), and SR 37's north junction (multiplex on I-69) for the same reason. Once I-69 Phase 6 is completed, the south junction of I-69 & SR 37 will use the planned I-465 Exit 5 system interchange, to be built just west of the existing SR 37 diamond interchange at Harding Street.

[mapman1071]

US 95 South Exits I-11 Bolder City, NV
US 60 West Exits I-17 At Thomas RD Phoenix, AZ

[MikeTheActuary]

The one that immediately pops to mind as a prime example of this:  CT 20 at the Windsor Locks / Windsor / East Granby tripoint -- traffic headed westbound exists the Bradley Airport Connector to continue on CT20 towards Granby, while the freeway continues north a fraction of a mile before ending at an under-construction roundabout.

[Super Mateo]

It might be shorter to list the US Routes that don't do this.

Listing only US Routes I have traveled on and only locations I've seen in person:
1:  Haven't seen it myself, but an above post confirms it as a yes.
6:  Yes (Lansing, IL; Lake Station, IN; Des Moines, IA; Moline, IL; Davenport, IA)
11:  Yes (I-77 in western VA)
12:  Yes (Cline Avenue in IN)
14:  Haven't been there, but I think it hops off the Madison Beltway
15:  Don't know, didn't happen in the two portions I've been on
18:  Same as 14
19:  Yes (Bounces on and off I-376 in Pittsburgh, PA)
20:  Yes (Harrison/I-39 in Cherry Valley, IL)
21:  No idea
22:  Likely in PA somewhere
23:  Maybe
24:  Yes (Logansport, IN bypass)
25:  Don't know
27:  Yes (Colerain, OH)
30:  Yes (Fort Wayne, IN)
31:  Yes (Indianapolis, IN)
33:  Yes (Fort Wayne, IN)
34:  Becomes the freeway in western IL, not sure if a ramp is required somewhere
35:  Yes (Muncie, IN; Kokomo, IN)
36:  Yes (Indianapolis, IN); but has a reverse situation eastbound near Decatur, IL where the freeway leaves instead
40:  Yes (IL side of the St. Louis area)
41:  Yes (Lake Shore Drive on the north side of Chicago, IL; I-80 in Hammond, IN)
45:  Probably, but not in the parts I've driven
50:  Don't know
51:  Yes (South Beloit, IL; Bloomington, IL)
52:  Yes (Indianapolis, IN; near the IN/OH border; Cincinnati, OH; Huntington, WV; Bluefield, WV; Bland, VA; Wytheville, VA)
61:  Yes (Davenport, IA; Frontenac, MO)
62:  Don't know
63:  Don't know
65:  Yes (Des Moines, IA)
67:  Maybe, but nowhere north of St. Louis)
68:  Don't know
69:  Don't know
74:  Don't know

I won't bother going into the 3dus, but it looks like this is quite common.  Every single one is either a yes or a don't know (and don't have the desire to look it up).