What is the most heavily used interchange for each interstate in your state?

[Zzonkmiles]

What would you say is the most important or most heavily used interchange in your state for each interstate highway that runs through it? For this thread, I'm excluding interstate-to-interstate connections, such as I-77/85 in North Carolina. So list a state, list an interstate highway, and list your candidate for the busiest interchange.

SOUTH CAROLINA
I-20: Clemson Road (Exit 80) (The Broad River Road exit at MM65 is very close, but the proximity of other exits to that exit gives the edge to Exit 80.)
I-77: Strom Thurmond Blvd/Forest Drive/Fort Jackson (Exit 12)
I-26/95/85: (This is a tough one. I'll let someone else take a stab at this one.)

[KEVIN_224]

Tough call for Connecticut! Perhaps I'd go with

I-84: CT 8 in Waterbury (the so-called "mix master")
I-91: US 5/CT 15 in Hartford for the Charter Oak Bridge
I-95: CT 34 in New Haven or CT 8 in Bridgeport

[hotdogPi]

Massachusetts:

84: US 20
90: Exit 18/20 (it's the same exit)
190: MA 2
290: MA 146
91: MA 57
291: US 20 (end of overlap)
391: MA 141, west of the river
93: US 1 (northern end of overlap)
95: US 3 north
195: MA 24
295: US 1
395: US 20
495: US 3 / Lowell Connector (single interchange, 5-way)

[6a]

I can find ODOT traffic counts for the freeways as they *pass* interchanges (some surprised me) but I can't find data regarding how many vehicles actually are using those interchanges. For example, I-670 at 4th clocks in with 181,830 but how do you figure out how many take the exit? Look at the counts for the next exit down and take a guess?

[froggie]

This begs a question to the OP:  are you referring to total traffic going through the interchange, or the level of traffic that enters/exits at the interchange?

[colinstu]

Wisconsin:
Zoo Interchange is #1 most used. Presentation from 2009 reported 345,000 AADT. Once it is done being reconstructed it will be able to handle even more cars with even less congestion and improved safety.

The Marquette Interchange from the same time reported 285,000.

Not sure of the numbers for the Mitchell / Hale but I'm sure they're lower since they're only 3-way interchanges. Unsure about Madison area interchanges too.

[Zzonkmiles]

This begs a question to the OP:  are you referring to total traffic going through the interchange, or the level of traffic that enters/exits at the interchange?

Ahhh, I meant the latter--traffic that actually enters or exits at that interchange.

[Zeffy]

The only one I would know for New Jersey:

I-95 / New Jersey Turnpike: Exits 73/74 and the George Washington Bridge

These others are complete guesses:

I-287: Either Exit 21 (I-78) or Exit 41 (I-80). Alternatively, Exit 37 for NJ 24.
I-78: Exit 52 (GSP)

EDIT: Didn't read the question thoroughly enough. Still stand for NJ 24 on I-287.

[signalman]

I-287: Either Exit 21 (I-78) or Exit 41 (I-80). Alternatively, Exit 37 for NJ 24.
I-78: Exit 52 (GSP)

The OP said to exclude interstate-to-interstate interchanges. 

With that said, I'd agree that I-287's busiest is likely Exit 37 for NJ 24.  I'll also agree that I-78's is likely the GSP.  I'm also going to guess that the GSP and their local acess ramps is I-80 and I-280's busiest interchanges, although I'm not certain of either.

[Thing 342]

For I-64 in VA, most likely Exit 263 for US-258 in Hampton.
I-264: Exit 17 for Independence Blvd (since ADT on 264 drops from 93000 to 75000 past here)
I-464: Exit 2 for US-13 (464 is mostly a through route, so this is a complete guess)
I-564: VA-406.
I-664: Either Exit 13 for US-13/58/460 or Exit 9 for US-17/VA-164.

[Charles2]

Alabama:

I-10: Junction I-65 north to Montgomery and Birmingham -or- US 90/98, Daphne/Fairhope (Exit 35 A-B)
I-20/59: "Malfunction Junction" interchange with I-65, downtown Birmingham -or- US 82 (McFarland Boulevard), Tuscaloosa (Exit 73)
I-20 (separate from I-59): US 411, Leeds/Moody (Exit 144-A/B)
I-22: will eventually be I-65 north of downtown Birmingham
I-59 (separate from I-20): Chalkville Mountain Road (Exit 141), Trussville
I-65: "Malfunction Junction" -or- US 31 (Montgomery Highway/Columbiana Road/Lorna Road), Hoover/Vestavia Hills (Exit 252)
I-85: Junction I-65, south to Mobile, north to Birmingham -or- AL-271 (Taylor Road), Montgomery (Exit 9)
I-459: US 280, Mountain Brook/Vestavia Hills/Hoover (Exit 19)

What say ye, fellow Alabamians, concerning I-359, I-565 and I-759?

[nwi_navigator_1181]

For Indiana, I will only mention the highways I've driven in full length, because there will be exits I could easily overlook on the partial runs.

For I-65, I'd give the nod to U.S. 30 (exit 253). At one time, it was listed in the Top 10 busiest interchanges in the U.S. It serves almost every major retailer, and the ramp gets clogged heavily during the holiday season, to the point it's easier to take the ramp beforehand (109th Ave. northbound, 61st Ave. southbound) and use surface streets to finish the rest.

For I-80/94, Ripley Street (Indiana 51, exit 15). This interchange funnels U.S. 6 away from the expressway, and is a truck stop haven. It also connects to the nearby Toll Road interchange, which has its share of traffic due to the fact I-80 traffic has to use it to stay on course.

For I-80/90, Indiana 933 and U.S. 31 Business (exit 77), made apparent during college football season with direct access to Notre Dame. The toll gate is even designed to handle massive football traffic, and volumes are high to the point where traffic is directed six miles further east to the Mishawaka exit (or to the St. Joseph Valley Parkway if heading west).

[Pink Jazz]

For I-10 in Arizona, I think The Stack (the western I-10/I-17 interchange) carries the most total traffic, however, in terms of peak density the Mini Stack (I-10/Loop 202/SR 51) holds the crown.

[cl94]

New York has a lot of freeways that aren't Interstates, so this isn't so hard.

I-87: Thruway Exit 16 (likely), with Northway Exits 6-7 being up there
I-90: Probably Thruway Exit 55 (US 219). If not, Exit 51 (NY 33) or 54 (NY 400)
I-787: Likely NY 7
I-684: either Saw Mill Pkwy or Hutchison River Parkway
I-278: Grand Central Parkway
I-84: Probably NY 17
I-990: North French Road
I-290: US 62
I-190: Exit 9/Peace Bridge
I-678: Grand Central/Jackie Robinson Pkwys
I-587: NY 32/28 

[jwolfer]

Florida: I'll start with ones I am most familiar with in Jacksonville and Orlando.  I-4 would be Florida's Turnpike or SR 535 big exit for Disney resort hotels. I-10 would be US 17 in Jax or possibly US 27 in Tallahassee. I-295 would be SR 21(Blanding Blvd). I-795 will be the exit at US1 (Philips hwy) this is a no brainer it will be the only exit that is not an interstate. I-95 I would imagine would be golden glades in Miami-dade county.  I-75 I would surmise in Tampa area

[empirestate]

New York has a lot of freeways that aren't Interstates, so this isn't so hard.

I-87: Thruway Exit 16 (likely), with Northway Exits 6-7 being up there
I-90: Probably Thruway Exit 55 (US 219). If not, Exit 51 (NY 33) or 54 (NY 400)
I-787: Likely NY 7
I-684: either Saw Mill Pkwy or Hutchison River Parkway
I-278: Grand Central Parkway
I-84: Probably NY 17
I-990: North French Road
I-290: US 62
I-190: Exit 9/Peace Bridge
I-678: Grand Central/Jackie Robinson Pkwys
I-587: NY 32/28 

Adding a couple:
I-390: Exit 14 (A-B), NY 15A/NY 252
I-490: Exit 23, NY 441
I-590: Exit 2 (A-B), NY 31

As for I-87, I'm gonna guess it's actually either the Macombs Dam Bridge or University Heights Bridge interchanges. Cross-County Parkway is another definite possibility.

And for I-95 it must certainly be NY 9A/Henry Hudson Parkway.

For I-495, I wouldn't be surprised if it's the Northern State Parkway crossovers at Exit 42. :-)

[kphoger]

^^ Most of those are Interstate-to-Interstate. They don't qualify.

[PHLBOS]

Massachusetts:

84: US 20
90: Exit 18/20 (it's the same exit)
190: MA 2
290: MA 146
91: MA 57
291: US 20 (end of overlap)
391: MA 141, west of the river
93: US 1 (northern end of overlap)
95: US 3 north
195: MA 24
295: US 1
395: US 20
495: US 3 / Lowell Connector (single interchange, 5-way)

Aren't you forgetting the Braintree Split (I-93 (US 1)/MA 3)?

[roadman65]

In Florida I would have to say I-4's busiest is Exit 74A for Sand Lake Road.  It serves many tourist areas, including the Dr. Phillips area of Orlando with its recent developmental sprawl and of course Universal Studios nearby.

In New Jersey on I-95 it would be Exit 11 in Woodbridge.  Back when I lived there it was the NJ Turnpike's busiest interchange with the road system's largest (maybe second largest if Exit 16E/ 18E is larger) toll plaza.  The fact is that for an exit plaza it was always with more lanes than even the mainline plazas at Exit 1 and 18W or many other state mainline plazas.

In New Jersey on I-78 it always was Exit 33 for Martinsville Road.  At one point NJDOT had to widen the overpass because corporate development in the area increased traffic counts through the interchange.

[bassoon1986]

My guesses in Louisiana:

I-10: Causeway Blvd (exit 228) in New Orleans
I-12: either US 61 (exit 2A or 2B) or LA 3002 at Denham Springs
I-20: US 71/ LA 1 (exit 19A) in Shreveport
I-49: LA 3132 (exit 201) in Shreveport
I-55: US 190 (exit 31) in Hammond
I-59: Don't know much about this strecth, maybe US 11 (exit 3)

BR and NO area 3di's I may be totally off:
I-110: LA 73 Government St? (exit 1A)
I-210: LA 385 Ryan St? (6A)
I-220: US 71/LA 1 (7a/7B) or LA 3105 Airline Dr (12)
I-310: LA 3127 (exit 10)
I-510: Almonaster Ave? (2C)
I-610: Elysian Fields Ave? (3)
I-910: exit 11 Tchoupitoulas or 11A Camp St

[cl94]

Adding a couple:
I-390: Exit 14 (A-B), NY 15A/NY 252
I-490: Exit 23, NY 441
I-590: Exit 2 (A-B), NY 31

As for I-87, I'm gonna guess it's actually either the Macombs Dam Bridge or University Heights Bridge interchanges. Cross-County Parkway is another definite possibility.

And for I-95 it must certainly be NY 9A/Henry Hudson Parkway.

For I-495, I wouldn't be surprised if it's the Northern State Parkway crossovers at Exit 42. :-)

Cross-County Parkway has a good argument. Problem is that we don't have a count of how many people enter/exit there. Traffic Data Viewer has Exit 16 near 50K (really easy because they put a counter between the tolls and NY 32). CCP is probably near that if not over.

Agree with the Rochester ones and I-95. Based on volumes, I'd say the LIE's busiest is the crossover at 38 (~40K).

[Takumi]

Some of my Virginia guesses:
I-95: Well, it's definitely in Northern Virginia. Probably one of the parkways (VA 286 or VA 294)
I-195: The south end, with VA 76 and VA 195 (still freeway to freeway)
I-295: US 1
I-395: Old Mixing Bowl
I-495: VA 7
I-85: Either US 460 or US 58, probably 460
I-66: insert Ethanman joke here
I-381: just kidding, it doesn't have any
I-77: One of the ones on its overlap with I-81. Either US 11 in Wytheville or US 52 east of it
I don't have enough knowledge/experience with I-81 to make an educated guess.

[SteveG1988]

NJ: Interstate 76/295/Nj42 interchange. I think it counts as the main road there is NJ42 after the interchange.

[jeffandnicole]

For South Jersey:

I-76:  US 130 (by default; the other exits are Interstate Highway related)

I-676:  I'm going to say the 5A,5B interchange for MLK Blvd, access to US 30, Cooper Medical & the Camden Waterfront

I-295:  Probably NJ 73; followed closely with NJ 70, NJ 42 and US 1.

I-195:  Exit 16/16A in the summer (Six Flags); otherwise Interchange 34 (GSP); Interchange 5 (US 130)

I-95 (Trenton area): US 1 or NJ 29

[sdmichael]

Well, California probably has everyone beat. I-10 and I-5 at the same interchange - East Los Angeles Interchange.