What are some infill interchanges you know of?

[RM42]

https://www.google.com/maps/@42.2945264,-71.2172921,3a,75y,325.95h,87.62t/data=!3m7!1e1!3m5!1sHIgPKBCMDnLJa9YLWNGTgg!2e0!5s20120701T000000!7i13312!8i6656?entry=ttu

In 2015 there was an interchange added here. What are some areas you know of where an interchange was added like this?

[epzik8]

In Maryland, I-95 exit 74 (originally 3A and a partial interchange, now full) at MD 152, and exit 80 at MD 543; also, I-70 exit 28 at MD 632 west of Hagerstown.

[Max Rockatansky]

So basically just interchanges on existing freeways where there wasn't one previously?  I mean, that's not exactly super uncommon or really notable.

[freebrickproductions]

So basically just interchanges on existing freeways where there wasn't one previously?  I mean, that's not exactly super uncommon or really notable.

Like, there's a new DDI going in on I-65 in Spring Hill, TN, just south of Nashville where there hadn't been any kind of interchange previously.

[jeffandnicole]

If there's a letter after a number on the NJ Turnpike between Interchanges 1 & 14, there.  Plus 15X & 19W.

[Big John]

Does the half interchange on I-43 at Rowe Rd count as it is rarely permitted to carry traffic?

[ran4sh]

So basically just interchanges on existing freeways where there wasn't one previously?  I mean, that's not exactly super uncommon or really notable.

This. Calling them "infill" interchanges comes from rail transit terminology (an "infill" station is added to existing rail line) but with freeways it's very common.

A few examples in my area just in the past couple of decades:

* Exit 118 on I-85, Gravel Springs Rd
* Exit 14 on I-985, newly built road for nearby warehouses
* Exit 20 on GA 10 Loop, Oconee Connector commercial development

[SectorZ]

Massachusetts...

Woburn on I-93, https://maps.app.goo.gl/hePrknNXfLutqhqeA
Marlboro on I-495, https://maps.app.goo.gl/tPwjHHB4jpsno1TF8
Millbury on I-90, https://maps.app.goo.gl/nBu65jwP9KdVvdRv5
Westboro on I-90, https://maps.app.goo.gl/ZKErsywB4yqXHs2N7

May be some others too I can't think of without hunting and pecking all over Google Maps

New Hampshire is adding one right now off I-93 in Londonderry.

[davewiecking]

I-69 along I-465 outside of Indianapolis.

Greenbelt Metro station and Arena Drive along I-95/495 outside of DC.

Probably harder to find: a 2DI (of significant length-looking at you, I-97) without any infill interchanges.

[webny99]

So basically just interchanges on existing freeways where there wasn't one previously?  I mean, that's not exactly super uncommon or really notable.

This. Calling them "infill" interchanges comes from rail transit terminology (an "infill" station is added to existing rail line) but with freeways it's very common.

I interpreted it to mean interchanges where the ramps are built up directly next to the freeway, essentially attached to the freeway with just a barrier wall separating mainline and ramps. That configuration may be somewhat common in urban areas, but it is extremely rare to nonexistent in rural areas.

[Great Lakes Roads]

Indiana-

I-65: Exit 97 (Worthsville Road), Exit 131 (CR 550 S), and Exit 249 (109th Avenue)
I-69: Exit 204 (106th Street) and Exit 317 (Union Chapel Road)
ITR: Exits 3 & 10 (SR 912), Exit 14B (SR 53/Broadway), Exit 23 (Willowcreek Road), Exit 72 (US 31), Exit 83 (SR 331), Exit 96 (CR 17), and Exit 101 (SR 15)

[kurumi]

Off the top of my head for CT, these are added interchanges for existing roads well after the freeway was constructed (and not involved with a major reconstruction of said freeway):

I-395 at CT 169 - was exit 83A IIRC
I-84 at Austin Road - exit 25A
I-95 exit 33 (was partial, now complete)

[Great Lakes Roads]

Illinois Tollway-

I-88: Exit 109 (IL 47)- partial to full, Exit 114 (Orchard Road), Exit 121 (Eola Road), Exit 123 (IL 59), Exit 125 (Winfield Road), I-355, Exit 134 (Highland Avenue)- partial to full
I-90: Exit 8 (IL 173), Exit 12 (East Riverside Boulevard), Exit 20 (Irene Road), Exit 36 (IL 23), Exit 47 (IL 47)- partial to full, Exit 52 (Randall Road), Exit 58 (Beverly Road), Exit 59 (IL 59)- partial to full, Exit 62 (Barrington Road)- partial to full, Exit 65 (Roselle Road), Exit 67 (Meacham Road), Exit 70 (Arlington Heights Road)- partial to full, Exit 73 (Elmhurst Road)- partial to full, Exit 74 (I-490)
I-94: Exit 13 (IL 137)- partial to full, Exit 19 (IL 60)- partial to full, Exit 25A (Lake-Cook Road)
I-294: Exit 6 (US 6)- partial to full, Exit 7 (I-57), Exit 8 (IL 83), Exit 17 (US 12/20)- partial to full, Exit 20 (88th/Cork Avenue)- new on-ramp to I-294 NB, Exit 22 (75th Street/Willow Springs Road), County Line Road, I-490, Exit 39 (Balmoral Avenue), Exit 46 (Willow Road)- partial to full, Exit 52 (Lake-Cook Road)

EDIT: Kinda crazy that suburbia has caused the ISHTA to add interchanges or improve existing interchanges along the tollway system... 

[US 89]

The 11400 South exit (292) on I-15 in Sandy/Draper UT is an infill interchange that was completed sometime around 2010. The closure of the direct State Street exit in around 2004 is likely at least part of the reason it was built.

On the other side of the metro, plans are in the works for an I-15 interchange at Shepard Lane in Farmington, between the existing Park Lane and Kaysville 200 North interchanges.

[1995hoo]

Exit 174 on I-95 in Virginia, the Eisenhower Avenue Connector. It was built many years after the rest of the road (and was Exit 3A when it first opened) because Alexandria anted to improve access to Eisenhower Avenue, an isolated area where the city wanted to encourage growth. VDOT and Fairfax County insisted that Clermont Avenue, a residential street located directly south of that interchange, be severed by construction of a sound wall (it has a gap for pedestrian and bike traffic). Clermont is in no way appropriate as an artery for thru traffic, so it was almost certainly correct for them to do that.

[davewiecking]

I-69 along I-465 outside of Indianapolis.

Greenbelt Metro station and Arena Drive along I-95/495 outside of DC.

Probably harder to find: a 2DI (of significant length-looking at you, I-97) without any infill interchanges.

Adding Ritchie-Marlboro Road on I-95/495.

Decided extra exits added that only serve HOT lanes on VA part of Beltway don't count, nor along I-66. But Fairfax Co Pkwy does.

ICC interchange along I-95.

[fillup420]

Does the half interchange on I-43 at Rowe Rd count as it is rarely permitted to carry traffic?

so what is the purpose of that interchange?

[Big John]

Does the half interchange on I-43 at Rowe Rd count as it is rarely permitted to carry traffic?

so what is the purpose of that interchange?

There is a golf course nearby and an occasional major PGA or LPGA event is played there.  The ramps are only open during those events.

[1995hoo]

I-69 along I-465 outside of Indianapolis.

Greenbelt Metro station and Arena Drive along I-95/495 outside of DC.

Probably harder to find: a 2DI (of significant length-looking at you, I-97) without any infill interchanges.

Adding Ritchie-Marlboro Road on I-95/495.

Decided extra exits added that only serve HOT lanes on VA part of Beltway don't count, nor along I-66. But Fairfax Co Pkwy does.

ICC interchange along I-95.

VA-234 Bypass on I-66 (Exit 44, I believe).

[SEWIGuy]

Does the half interchange on I-43 at Rowe Rd count as it is rarely permitted to carry traffic?

so what is the purpose of that interchange?

There is a golf course nearby and an occasional major PGA or LPGA event is played there.  The ramps are only open during those events.

And for a number of reasons, is likely not going to be hosting such events anytime in the near future.

[fwydriver405]

Some Maine examples on I-95:

Don't know if this counts and/or if this is an unusual case, but the original Exit 5 off the Maine Turnpike to ME Route 112 is being rebuilt to re-connect the Turnpike to Route 112.

The old exit 5 was moved slightly north for an I-195 connection, and the southbound ramps were closed/demolished when the Turnpike was widened to six lanes between 2000 and 2004 from the York Toll Plaza to Exit 44. After the widening, the northbound ramps were for Ramada hotel access only, until just recently, when they were rebuilt for the re-connection to Route 112 (still closed as of the posting of this message). The old exit 5, now called Exit 35, will be configured into a parclo interchange and will tie into the Exit 36 interchange to mitigate the weaving between the movements via C/D ramps.

---

Staying on the Maine Turnpike, the proposed Gorham Connector to the west will connect the Gorham Bypass to present day Exit 45 (Old exit 7). Again, not sure if this counts since this technically is an extension of the original interchange.

Exits 46 (Jetport - Old exit 7 A), 47 (TO ME 25 / Westbrook Arterial - Old exit 7 B), and 86 (ME 9 / Sabattus - no old exit, added AFTER the exit numbering changes) were also infill interchanges as well in the Portland area. 46 opened around the 1990s, 47 in 2002, and 86 in 2004. [Source]

---

Heading north on I-95, in Waterville, Exit 124: Trafton Road was opened on July 14, 2017.

In Bangor, Exit 186 (old exit 48 A): Stillwater Avenue was opened in 2001 to relieve traffic on nearby Exit 187 (old exit 49): Hogan Road near the Bangor Mall and Stillwater Avenue business district.

---

In Massachusetts, NEW exit 25, to Dedham St - Canton, Westwood was opened around December 2023. This new exit is not to be confused with OLD exit 25 (now exit 39 B) - to I-90 / Mass. Pike. It is located just south of Exit 26: to I-93 / MA Route 128 and only has a northbound off-ramp and a southbound on-ramp.

[TEG24601]

Washington: I-5 Exit 11, for SR 502.  This was originally a NB Rest Area.  Around 2003, traffic demands to the city of Battleground grew to the point that the existing SR 503 route was being overwhelmed.  There were alternate routes to I-5, but this was built as a new Interchange to directly feed the city.  While it currently only feeds to the East, it is likely that it will be expanded to connected to the West to the city of Ridgefield

[froggie]

None in Vermont at present, although VTrans is considering whether to add an interchange on I-89 at VT 116.  Had VT 289 been built as originally planned, there would have been two more on I-89, and at one point there was consideration of a new interchange on I-89 in Milton.


There's been a number of infill interchanges and ramps in Minnesota.  In keeping with the spirit of the OP, I'm specifically referring to new interchanges added along corridors that were already freeway...not new interchanges along non-freeway corridors or corridors being converted to freeway. So, for example, what's been built along US 52 between Rosemount and Rochester does not count.

Here's what I can think of offhand in Minnesota:

I-35/I-35E/I-35W:

• I-35 Exit 84 south ramps at Dakota CSAH 60 (interchange was originally a half-diamond to the north)
• I-35 Exit 86 at Dakota CSAH 46
• I-35E Exit 108 at Cayuga St (though this technically replaced the original interchange at Pennsylvania Ave, granted that interchange was missing ramps)
• I-35W Exit 15A, southbound off-ramp at Lake St
• I-35W Exit 15B, northbound off-ramp to 28th St
• I-35W northbound on-ramp from 4th St
• I-35W Exit 28C, northbound off-ramp to County Road H
• I-35 Exit 143 at Chisago CSAH 17
• I-35 Exit 171 at Pine CSAH 11
• I-35 Exit 237 north ramps at MN 33 (originally just a half-directional to the south)
• I-35 Exit 253A north ramps at US 2 East (pre-Bong Bridge, there was just a half-diamond to the south here)
• I-35 Exit 253B south ramps at 40th Ave W (added when the Bong Bridge was built)

I-94: (excluding 94/694 concurrency)

• I-94 Exit 1B at 20th St
• I-94 Exit 2B at 34th St
• I-94 Exit 57 at MN 210 East
• I-94 Exit 100 at MN 27 West
• I-94 Exit 173 at Opportunity Dr
• I-94 Exit 194 at Wright CSAH 18 (replaced an earlier half-interchange at CSAH 75)
• I-94 Exit 201 east ramps at Wright CSAH 19 (previously a half-diamond to the west)
• I-94 Exit 205 west ramps at MN 241 (previously a half-dimaond to the east)
• I-94 Exit 210 at Dayton Pkwy
• I-94 Exit 212 at MN 610

I-494/I-694: (including 94/694 concurrency)

• I-494 Exit 8 west ramps at Hennepin CSAH 28 (originally a half-diamond to the east)
• I-494 Exit 11A at Prairie Center Dr and Flying Cloud Dr
• I-494 Exit 12 at Valley View Rd
• I-494 Exit 20 at Carlson Pkwy
• I-494 Exit 21 at Hennepin CSAH 6
• I-94/694 Exit 28 at Hennepin CSAH 61
• I-94/694 Exit 30 at Boone Ave
• I-94/694 Exit 34 at Shingle Creek Pkwy
• I-694 Exit 48 at US 61 (originally only had ramps EB 694 to NB 61 and SB 61 to WB 694)
• I-494 Exit 58C at Tamarack Dr
• I-494 Exit 60 at Lake Rd
• I-494 northbound on-ramp from Bailey Rd

Other:

• US 10 at Otter Tail CSAH 34 near Perham
• US 71/MN 23 at Willmar Ave SE in Willmar
• MN 15 at 33rd St S near St. Cloud

[webny99]

So basically just interchanges on existing freeways where there wasn't one previously?  I mean, that's not exactly super uncommon or really notable.

This. Calling them "infill" interchanges comes from rail transit terminology (an "infill" station is added to existing rail line) but with freeways it's very common.

I interpreted it to mean interchanges where the ramps are built up directly next to the freeway, essentially attached to the freeway with just a barrier wall separating mainline and ramps. That configuration may be somewhat common in urban areas, but it is extremely rare to nonexistent in rural areas.

Does everything mentioned so far fit this definition, or am I just misguided as to what infill means?

[ilpt4u]

Illinois Tollway-

I-88: Exit 109 (IL 47)- partial to full, Exit 121 (Eola Road)
I-90: Exit 8 (IL 173), Exit 20 (Irene Road), Exit 36 (IL 23), Exit 47 (IL 47)- partial to full, Exit 62 (Barrington Road)- partial to full, Exit 65 (Roselle Road)- partial to full, Exit 67 (Meacham Road), Exit 73 (Elmhurst Road), Exit 74 (I-490)
I-294: Exit 7 (I-57), Exit 8 (IL 83), Exit 20 (88th/Cork Avenue), County Line Road, I-490

88th/Cork Ave was an old Tri-State exit that was eliminated, and it is being/has been reinstalled with the Central Tri-State project

I'm sure I-39 exits on I-55, I-80, I-88, and US 20 were added when I-39 was constructed. Same with exits for I-355 on I-80, I-55, and I-88

Isn't Peace Rd serving DeKalb and Sycamore a "newer" exit on I-88? Want to say Orchard Rd serving Aurora and North Aurora was also a later addition for 88/E-W/Reagan Tollway