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Author Topic: Interstates where at least one direction has a single lane  (Read 2698 times)

STLmapboy

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Hi all, first time making a topic. As the subject says, I was wondering about examples examples interstates where at least one direction only occupies a single lane (ramps included). For ramps, I know that 95 NB does one lane at the 93 interchange south of Boston...
https://www.google.pl/maps/@42.2080987,-71.1397216,3a,60y,90t/data=!3m6!1e1!3m4!1sufMIVhencaQ-wzrfmjt89Q!2e0!7i16384!8i8192
...as does 55 SB at Crump in Memphis (NB's cloverleaf was widened to 2):
https://www.google.pl/maps/@35.1248019,-90.0692769,3a,75y,112.23h,91.89t/data=!3m6!1e1!3m4!1slOREzHtqBr_Zf9Z5nXK1Uw!2e0!7i16384!8i8192
And in non ramp related instances, I-93 does a super two in Franconia Notch NH for environmental purposes:
https://www.google.pl/maps/@44.1558288,-71.6777066,3a,60y,90t/data=!3m6!1e1!3m4!1snMfq71RAY3ui0Vws7XP5SA!2e0!7i16384!8i8192

Anything else? Contributions are greatly appreciated.
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jeffandnicole

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Re: Interstates where at least one direction has a single lane
« Reply #1 on: May 11, 2020, 06:19:57 PM »

I-76 EB in Philly, going from the Schuykill Expressway to the Walt Whitman Expressway.

https://maps.app.goo.gl/QNYMe8QRVW79PSTT6

It's just for a moment, and even the sign isn't correct here. You're already on I-76 East, so you're not going "To" I-76 East.

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Thunderbyrd316

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Re: Interstates where at least one direction has a single lane
« Reply #3 on: May 11, 2020, 07:09:27 PM »

   Interstate 705 Northbound in downtown Tacoma briefly has only a single through lane before an additional lane returns after the on ramp from SR 509. The lanes to the left exit into the City Center.

   Link: https://www.google.com/maps/@47.2439608,-122.4347014,3a,75y,348.51h,96.43t/data=!3m6!1e1!3m4!1sHNMDAuHVhL_TNjiHLk0qXw!2e0!7i16384!8i8192
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Crown Victoria

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Re: Interstates where at least one direction has a single lane
« Reply #6 on: May 11, 2020, 08:15:30 PM »

I-49 at both its junctions with I-44.

I-39 at its junction with US 20, Rockford, IL

Formally:
I-70 at the Poplar Street Bridge in St Louis, MO
I-540 in Van Buren, AR
« Last Edit: May 11, 2020, 08:20:10 PM by ozarkman417 »
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dlsterner

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Re: Interstates where at least one direction has a single lane
« Reply #7 on: May 11, 2020, 10:03:41 PM »

I-81 in New York near the Canada border crosses over a two lane bridge - The Thousand Islands Bridge, which is actually a system of five bridges.
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Roadgeekteen

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Re: Interstates where at least one direction has a single lane
« Reply #8 on: May 11, 2020, 10:43:36 PM »

I-70 in Breezwood.
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sprjus4

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Re: Interstates where at least one direction has a single lane
« Reply #9 on: May 11, 2020, 10:45:04 PM »

I-64 EB at the northern I-81 split.
I-64 WB at the southern I-81 split.
I-73 NB at I-85 junction.
I-73 SB at I-85 junction.


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sprjus4

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Re: Interstates where at least one direction has a single lane
« Reply #10 on: May 11, 2020, 10:47:04 PM »

I-70 in Breezwood.
It's at least 2 lanes in each direction through Breezewood including the ramps at US-30.

At the Turnpike itself, it briefly is one lane through the interchange though for westbound traffic.
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cwf1701

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Re: Interstates where at least one direction has a single lane
« Reply #11 on: May 11, 2020, 11:00:59 PM »

I-75 at the International Bridge near the northern end of I-75.
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TheHighwayMan394

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Re: Interstates where at least one direction has a single lane
« Reply #12 on: May 11, 2020, 11:21:31 PM »

I-394 WB over I-94 in Minneapolis.
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Roadrunner75

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Re: Interstates where at least one direction has a single lane
« Reply #13 on: May 11, 2020, 11:41:30 PM »

I-76 EB in Philly, going from the Schuykill Expressway to the Walt Whitman Expressway.

https://maps.app.goo.gl/QNYMe8QRVW79PSTT6

It's just for a moment, and even the sign isn't correct here. You're already on I-76 East, so you're not going "To" I-76 East.
I've always wondered if there was more significance to that "TO" than just a sign error, such as the Walt Whitman approach freeway on the PA side (DRPA owned?) not being formally I-76 or something like that....similar to that I-90 / Chicago Skyway thing.
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Roadmaestro95

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Re: Interstates where at least one direction has a single lane
« Reply #14 on: May 11, 2020, 11:54:33 PM »

Technically I-495's eastern end on Long Island (the ramp to Exit 73) is one lane, and is referenced marked as "495" to where it connects to CR-58. My point is the original alignment has the one lane where it can be at least two.
But I'll add my favorite one-lane Interstate highway: I-93 in northern New Hampshire. Such a beautiful ride through Franconia Notch
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RobbieL2415

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Re: Interstates where at least one direction has a single lane
« Reply #15 on: May 12, 2020, 12:16:45 AM »

Technically, I-95 NB is one lane at the interchange to MA 128.  If it had actually gone through Boston, this would not be the case.

I-90 is one lane each direction when it leaves the Berkshire Extension of the NY Thruway.
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jp the roadgeek

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Re: Interstates where at least one direction has a single lane
« Reply #16 on: May 12, 2020, 12:45:56 AM »

I-80 WB is briefly one lane on the approach to leave for the Ohio Turnpike (it becomes 2 lanes on the ramp)

I-293 becomes one lane for a few feet as it merges with the Everett Turnpike northbound.  It also becomes one lane southbound as it merges with NH 101

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theline

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Re: Interstates where at least one direction has a single lane
« Reply #17 on: May 12, 2020, 01:59:22 AM »

I-80 WB is briefly one lane on the approach to leave for the Ohio Turnpike (it becomes 2 lanes on the ramp)

I-293 becomes one lane for a few feet as it merges with the Everett Turnpike northbound.  It also becomes one lane southbound as it merges with NH 101

I-80 WB is also on a one-lane ramp in Portage, Indiana, where it switches from the concurrency with I-90 (on the ITR) to the concurrency with I-94 (the Borman). In fact, I-80 EB is also on a one-lane ramp at the same location. Both are subject to significant backups.
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ilpt4u

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Re: Interstates where at least one direction has a single lane
« Reply #18 on: May 12, 2020, 02:01:54 AM »

I-80, when it jumps between the Indiana Toll Road and Borman Expressway in NW Indiana

Then I-80 again, as well as I-74, at their “bump” in the Quad Cities, IL area

I-72 at the NE Split with I-55 in Springfield, IL

I-74 at its Trumpet Interchange at the NW Split with I-55 in Bloomington/Normal, IL

I-39 at the US 20 Freeway south of Rockford, IL

I think that covers the IL examples. and also I-80 in NW Indiana for good measure...also is the only point in Hoosierland where I-80 isn’t multiplexed with either I-90 or I-94
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sparker

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Re: Interstates where at least one direction has a single lane
« Reply #19 on: May 12, 2020, 03:34:22 AM »

I mentioned it in the "sharp curves in Interstate interchanges" topic, but NB I-215's ramp as it segues from its multiplex with CA 60 onto the NB terminal segue from the CA 91 freeway in Riverside starts out as 2 lanes but shrinks down to one for the final and pretty damn sharp curve before merging.  Apparently when D8 was planning the interchange upgrades in the late '90's they were going to raze the residential block on the northeast side of the interchange, but ran into a buzzsaw of opposition -- so the final plans essentially repaved the existing WB>NB interchange ramp but kept the same footprint.  While not optimal by any means as the continuation facility for NB I-215, the saving grace is that it isn't generally a major commute movement, as much of the morning traffic from Moreno Valley/Perris-area residents either remains on WB CA 60 toward Ontario-area employment centers or turns SW onto CA 91 toward Corona and Orange County. 
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DandyDan

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Re: Interstates where at least one direction has a single lane
« Reply #20 on: May 12, 2020, 05:18:58 AM »

Both directions of I-35 at the east Mixmaster interchange in the Des Moines area, where it meets I-80 and the east end of I-235.
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Tom958

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Re: Interstates where at least one direction has a single lane
« Reply #21 on: May 12, 2020, 07:36:49 AM »

I-76 EB in Philly, going from the Schuykill Expressway to the Walt Whitman Expressway.

https://maps.app.goo.gl/QNYMe8QRVW79PSTT6

It's just for a moment, and even the sign isn't correct here. You're already on I-76 East, so you're not going "To" I-76 East.

That is just bizarre. I'm glad you pointed it out because I never would've seen it otherwise.

For whatever reason, I looked back at the old Streetviews and discovered that button copy signage without yellow exit only panels was in existence until October 2018. Further east, the yellow overheight warning panel for the Penrose Avenue exit wasn't installed until 2015-16.
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Re: Interstates where at least one direction has a single lane
« Reply #22 on: May 12, 2020, 09:15:10 AM »

I-70 in Breezwood.
It's at least 2 lanes in each direction through Breezewood including the ramps at US-30.

At the Turnpike itself, it briefly is one lane through the interchange though for westbound traffic.

On a related note, there's also I-70 at the other end of the Turnpike overlap in New Stanton, where the interchange ramps on either side of the toll plaza are one lane each direction.
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Re: Interstates where at least one direction has a single lane
« Reply #23 on: May 12, 2020, 09:38:58 AM »

I-81 in New York near the Canada border crosses over a two lane bridge - The Thousand Islands Bridge, which is actually a system of five bridges.

Ooh, nice! Forgot about that one. That's much more interesting than all the obvious examples through interchanges that are being posted.
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Re: Interstates where at least one direction has a single lane
« Reply #24 on: May 12, 2020, 09:47:23 AM »

I-695 in Maryland used to have "super two" sections on either side of the Key Bridge. The portion south of the bridge was dualized by the early 1980s; widening the portion north of it wasn't finished until 2000.
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