Interstate 10 travelers are relegated to one through lane at the interchange where the route merges with Interstate 35 southwest of downtown San Antonio:
http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=nwzh5v6sqndr&style=b&lvl=1&tilt=-90&dir=0&alt=-1000&scene=6114579&phx=0&phy=0&phscl=1&encType=1 (http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=nwzh5v6sqndr&style=b&lvl=1&tilt=-90&dir=0&alt=-1000&scene=6114579&phx=0&phy=0&phscl=1&encType=1)
Additionally Interstate 278 drivers are relegated to one through lane when the route switches from the BQE to the GCP in Brooklyn:
http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=qsv4y88v74bf&style=b&lvl=1&tilt=-90&dir=0&alt=-1000&scene=1769140&phx=0&phy=0&phscl=1&encType=1 (http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=qsv4y88v74bf&style=b&lvl=1&tilt=-90&dir=0&alt=-1000&scene=1769140&phx=0&phy=0&phscl=1&encType=1)
How many others are there?
To stay on Interstate 84 eastbound at the interchange with Interstate 86 in Idaho, travelers are regulated to one through lane.
http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=42.569936~-113.517673&style=h&lvl=16&tilt=-90&dir=0&alt=-1000&phx=0&phy=0&phscl=1&encType=1 (http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=42.569936~-113.517673&style=h&lvl=16&tilt=-90&dir=0&alt=-1000&phx=0&phy=0&phscl=1&encType=1)
There are several of these in the Oklahoma City area:
There is only one lane on either direction of I-35 through the I-35/I-235/I-40 interchange.
I-44 East exits off the mainline freeway on one lane at the OK 3/OK 66/OK 74 interchange in northwest OKC.
I-44 through traffic is one lane only in both directions where it leaves/enters the Turner Turnpike.
I-93 is one lane each direction for a few miles through the Franconia Notch Park in norther New Hampshire.
I-278 also reduces to one lane each way through the NJ Turnpike interchange.
This seems like a pretty common occurrence at the ends of (some) multiplexes and at major interchanges involving multiple interstate highways, especially when one changes direction at the interchange.
As I recall I-40 eastbound shrinks to one lane on a ramp at the interchange with I-240 on the east side of Memphis.
I-20 in west Georgia was one lane in either direction (east and west), while the freeway pavement (concrete) was being rehabilitated.
Be well,
Bryant
* I-55 at the west end of the PSB in St. Louis:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.617834,-90.190963&spn=0,359.994507&z=18&layer=c&cbll=38.618883,-90.190183&panoid=Rq8yBUelXe_ST-8n6NNYMw&cbp=12,35.8081703867594,,0,-0.9950394467096761 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.617834,-90.190963&spn=0,359.994507&z=18&layer=c&cbll=38.618883,-90.190183&panoid=Rq8yBUelXe_ST-8n6NNYMw&cbp=12,35.8081703867594,,0,-0.9950394467096761)
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.619968,-90.188629&spn=0,359.994507&z=18&layer=c&cbll=38.620528,-90.189378&panoid=0CPeeKrwMr75JZQlyLdGtQ&cbp=12,306.6076894318843,,0,8.260460049964909 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.619968,-90.188629&spn=0,359.994507&z=18&layer=c&cbll=38.620528,-90.189378&panoid=0CPeeKrwMr75JZQlyLdGtQ&cbp=12,306.6076894318843,,0,8.260460049964909)
* I-70 also has a one lane mainline at this interchange.
* I-55 in Memphis after crossing the Mississippi River:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=35.124595,-90.066605&spn=0,359.989014&z=17&layer=c&cbll=35.124366,-90.068524&panoid=sVeid1k7TacgOMLgJtXbZg&cbp=12,135.44743447828625,,0,5 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=35.124595,-90.066605&spn=0,359.989014&z=17&layer=c&cbll=35.124366,-90.068524&panoid=sVeid1k7TacgOMLgJtXbZg&cbp=12,135.44743447828625,,0,5)
NB I-55 gets a tight loop ramp there.
* I-70 in Wheeling, WV:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=40.071011,-80.72181&spn=0,359.978027&z=16&layer=c&cbll=40.072428,-80.723447&panoid=CSvWP_lGkCjCy0yNOt4JNg&cbp=12,252.66691464981596,,0,4.579295477423883 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=40.071011,-80.72181&spn=0,359.978027&z=16&layer=c&cbll=40.072428,-80.723447&panoid=CSvWP_lGkCjCy0yNOt4JNg&cbp=12,252.66691464981596,,0,4.579295477423883)
* I-72 at its former terminus at I-55:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.801654,-89.592927&spn=0,359.989014&z=17&layer=c&cbll=39.801982,-89.595798&panoid=JoGqEtPF9CDzAJxoV5AB7Q&cbp=12,288.23748637145064,,0,0.582602512950771 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.801654,-89.592927&spn=0,359.989014&z=17&layer=c&cbll=39.801982,-89.595798&panoid=JoGqEtPF9CDzAJxoV5AB7Q&cbp=12,288.23748637145064,,0,0.582602512950771)
* I-35 at the western spilt from I-70:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.106924,-94.590019&spn=0.000957,0.002747&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.106924,-94.590019&spn=0.000957,0.002747&t=k&z=19)
* I-70 before crossing the Kansas River in Kansas City, Kansas:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.113014,-94.615095&spn=0,359.989014&t=k&z=17&layer=c&cbll=39.113327,-94.61755&panoid=Ivrbc-gXDsGKeTL-u1DofQ&cbp=12,53.69194948882216,,0,9.627749748337294 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.113014,-94.615095&spn=0,359.989014&t=k&z=17&layer=c&cbll=39.113327,-94.61755&panoid=Ivrbc-gXDsGKeTL-u1DofQ&cbp=12,53.69194948882216,,0,9.627749748337294)
* I-470 where it leaves the Kansas Turnpike:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.991863,-95.690145&spn=0.003836,0.010986&t=k&z=17 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.991863,-95.690145&spn=0.003836,0.010986&t=k&z=17)
* I-74 at the eastern interchange with I-465 (and this one isn't that old):
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.733726,-86.042733&spn=0,359.956055&z=15&layer=c&cbll=39.730952,-86.042477&panoid=j6vPYKQ3WK7GA2wZzzrhpw&cbp=12,47.44311361940788,,0,11.100215577353701 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.733726,-86.042733&spn=0,359.956055&z=15&layer=c&cbll=39.730952,-86.042477&panoid=j6vPYKQ3WK7GA2wZzzrhpw&cbp=12,47.44311361940788,,0,11.100215577353701)
* I-74 at the western interchange with I-465:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.805033,-86.273489&spn=0.003791,0.010986&t=k&z=17 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.805033,-86.273489&spn=0.003791,0.010986&t=k&z=17)
* I-69 at I-55 in Mississippi: http://maps.google.com/maps?hl=en&ie=UTF8&ll=34.862183,-89.990923&spn=0,359.978027&t=k&z=16&layer=c&cbll=34.863327,-89.992578&panoid=3mHkKom5CV0qynw9pu1iag&cbp=12,216.60246203063792,,0,7.103522612880583 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=34.862183,-89.990923&spn=0,359.978027&t=k&z=16&layer=c&cbll=34.863327,-89.992578&panoid=3mHkKom5CV0qynw9pu1iag&cbp=12,216.60246203063792,,0,7.103522612880583)
I-5 does this when it exits off of itself in two different places in the central valley.
I-83 northbound at PA 581 in Harrisburg
I-279 at I-376 used to be one lane going south onto the Fort Pitt Bridge before the bridge and tunnel reconstruction.
I-81 over the Thousands Islands Bridge is only one lane each direction. And no median, either; just a double yellow line. You can't even tell it's an interstate, especially since NYSDOT refuses to sign it as such on guide signs.
I-185 at its north end near LaGrange, GA - the ramp to I-85 SB is one lane for 1/4 Mile - Looks like a stub end as well with enough room for 2 lanes.
I-394 WB in Minneapolis drops to one lane after the exit to the HOV reversible lanes. It gains 2 more from the I-94 West on-ramp quickly after (about 1/4 mile), though.
I-70 at I-695.
And need I mention the crazy situation where Ohio Turnpike exit 218 involves ramps such that you briefly have one lane that's both I-76 east and I-80 west (and vice versa)?
I-8 about a mile from its beginning in San Diego. At the I-5 junction, it reduces to one lane temporarily.
I-95 at the infamous cloverleaf in Canton where it is routed onto beltway 128 because, hey look at that, they forgot to build it going forward.
then again, it reduces to zero lanes in New Jersey, which is even sillier.
Quote from: Duke87 on January 30, 2009, 05:53:11 PM
And need I mention the crazy situation where Ohio Turnpike exit 218 involves ramps such that you briefly have one lane that's both I-76 east and I-80 west (and vice versa)?
I commented about that interchange in another forum talking about numbers changing while remaining on the physical road's mainline.
Not, only do you have that, but they also reactivated and reconnected part of the
ORIGINAL interchange 15 (old numbering) to restore access to county highway 18 (former Ohio 18). Man that extension is goofy!
Also both ways on I-83 at the strange I-283/US 322 interchange:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=40.253304,-76.811857&spn=0.003767,0.010986&t=k&z=17 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=40.253304,-76.811857&spn=0.003767,0.010986&t=k&z=17)
I-79 at I-70 in Washington, PA
I-10 EB at I-110, as you come off the Miss. River bridge in Baton Rouge:
http://www.southeastroads.com/louisiana001/i-010_eb_exit_155b_01.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_155b_01.jpg) (Approaching the I-110 interchange)
http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_01.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_01.jpg) (Manuevering on the mainline thru the interchange proper)
http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_02.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_02.jpg) (Immediately after the merge with SB 110)
The (virtually 90 degree) ramp to follow I-10 east through the I-110 jct is two lanes wide, but the right lane immediately becomes exit only for Washington Street. So functionally, if not technically, I-10 EB is a one lane mainline at this location.
Gotta love early 1960s interchange design.
Quote from: Urban Prairie Schooner on February 03, 2009, 09:30:46 PM
I-10 EB at I-110, as you come off the Miss. River bridge in Baton Rouge:
The (virtually 90 degree) ramp to follow I-10 east through the I-110 jct is two lanes wide, but the right lane immediately becomes exit only for Washington Street. So functionally, if not technically, I-10 EB is a one lane mainline at this location.
Gotta love early 1960s interchange design.
Technically speaking, Interstate 10 eastbound at Interstate 65 forces drivers into one lane as one lane ends at the merge with the southbound ramp from Interstate 65, followed by the second lane from the right defaulting to Alabama 163 (Dauphin Island Parkway). All the while travelers must deal with the influx of traffic from the left emanating from Interstate 65.
Quote from: Urban Prairie Schooner on February 03, 2009, 09:30:46 PM
I-10 EB at I-110, as you come off the Miss. River bridge in Baton Rouge:
http://www.southeastroads.com/louisiana001/i-010_eb_exit_155b_01.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_155b_01.jpg) (Approaching the I-110 interchange)
http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_01.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_01.jpg) (Manuevering on the mainline thru the interchange proper)
http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_02.jpg (http://www.southeastroads.com/louisiana001/i-010_eb_exit_156a_02.jpg) (Immediately after the merge with SB 110)
The (virtually 90 degree) ramp to follow I-10 east through the I-110 jct is two lanes wide, but the right lane immediately becomes exit only for Washington Street. So functionally, if not technically, I-10 EB is a one lane mainline at this location.
Gotta love early 1960s interchange design.
Now, if I remember my history right, the reason for that SNAFU of an interchange design was that in the 1960's when Interstate 10 was in the design stage, it was assumed to use the US 190 corridor through Opelousas and Airline Highway rather than the US 90 corridor; and that the proposed freeway that ultimately became I-110/I-10 was to be a through freeway that would funnel traffic between Scenic Highway and Perkins Road. Apparently, the designers of that time didn't think about the fact that I-10 might be built further south.....thusly, the through movements were assumed to be north-south.
LaDOTD has attempted to jerry-rig a temporary solution recently by shifting some lane usage at the I-10/I-110 Split interchange so that the "off ramp" carrying eastbound I-10 at least merges into two lanes rather than becomes the Washington St. auxilliary ramp. It's helped somewhat....but is no replacement for ultimately building a two-lane ramp.
Personally, I'd totally junk this old model and completely rebuild the interchange so that I-10 gets the through traffic movements and three lanes consistently through it, and that the off-ramp connectors to and from I-110 are two lanes each. That would completely foul up rush hour traffic in BR, though (especially since this thoroughfare is basically BR's only main entry/exit from downtown and the Capitol complex south), so I wouldn't count on that happening.
Also, as part of the widening of I-10 that has been proposed, there was thought of eliminating the Washington St. exit entirely in order to make the "on ramp" more of a through lane and extending a new aux lane from Louisa St. to Dalrymple Drive (first exit that serves LSU and University Lake. Problem was, that exit serves a mostly poor, Black community, and local leaders cried serious foul over losing an exit, even though they could have used other locations such as Highland Road/Nicholson Drive and Louisa St. to access I-10 easily within the existing street system. After the sticker shock of how much a outer toll loop would cost, however, the opinions of those folk has changed a bit; a new study for widening I-10 within BR is now in the works starting this year.
Just a bit of local background.
Anthony
I-75 at the I-375/M-3 connector in downtown detroit
Quote from: froggie on February 04, 2009, 06:29:57 PM
QuoteTechnically speaking, Interstate 10 eastbound at Interstate 65 forces drivers into one lane as one lane ends at the merge with the southbound ramp from Interstate 65, followed by the second lane from the right defaulting to Alabama 163 (Dauphin Island Parkway). All the while travelers must deal with the influx of traffic from the left emanating from Interstate 65.
However, since you still have those two lanes between the merge from 65 and the off-ramp to 163, it's not a true "one-lane" situation. Sure you have to merge over, but there's numerous places across the country where that's the case.
No its not, I was drawing the comparison between the Interstate 10/110 configuration in Baton Rouge. Perhaps my use of the term technically speaking was ill-advised. :crazy:
Quote from: mightyace on January 30, 2009, 06:03:12 PM
Quote from: Duke87 on January 30, 2009, 05:53:11 PM
And need I mention the crazy situation where Ohio Turnpike exit 218 involves ramps such that you briefly have one lane that's both I-76 east and I-80 west (and vice versa)?
I commented about that interchange in another forum talking about numbers changing while remaining on the physical road's mainline.
Not, only do you have that, but they also reactivated and reconnected part of the ORIGINAL interchange 15 (old numbering) to restore access to county highway 18 (former Ohio 18). Man that extension is goofy!
That is one odd interchange. Here's a link in Microsoft Virtual Earth:
http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=41.112517~-80.836995&style=r&lvl=15&tilt=-90&dir=0&alt=-1000&scene=24526053&phx=0&phy=0&phscl=1&encType=1 (http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=41.112517~-80.836995&style=r&lvl=15&tilt=-90&dir=0&alt=-1000&scene=24526053&phx=0&phy=0&phscl=1&encType=1)
Click "Bird's Eye" to see it in detail.
Quote from: Michael on February 05, 2009, 01:05:28 PM
Quote from: mightyace on January 30, 2009, 06:03:12 PM
Quote from: Duke87 on January 30, 2009, 05:53:11 PM
And need I mention the crazy situation where Ohio Turnpike exit 218 involves ramps such that you briefly have one lane that's both I-76 east and I-80 west (and vice versa)?
I commented about that interchange in another forum talking about numbers changing while remaining on the physical road's mainline.
Not, only do you have that, but they also reactivated and reconnected part of the ORIGINAL interchange 15 (old numbering) to restore access to county highway 18 (former Ohio 18). Man that extension is goofy!
That is one odd interchange. Here's a link in Microsoft Virtual Earth:
http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=41.112517~-80.836995&style=r&lvl=15&tilt=-90&dir=0&alt=-1000&scene=24526053&phx=0&phy=0&phscl=1&encType=1 (http://maps.live.com/default.aspx?v=2&FORM=LMLTCP&cp=41.112517~-80.836995&style=r&lvl=15&tilt=-90&dir=0&alt=-1000&scene=24526053&phx=0&phy=0&phscl=1&encType=1)
Click "Bird's Eye" to see it in detail.
I've been through that interchange dozens of times in my life. From road level it really looked weird when they added the connection to the old exit 15 trumpet on CR 18. I've been on nearly all the ramps at this exit except those to connect with the old exit.
And, if you look closely, you'll see that the extension to the old exit only connects to the turnpike mainline. You can't get to/from the I-76 West/I-80 East free mainline from CR-18 here. However, as CR-18 parallels the freeway, there are other exits to do that.
What I've always wondered is WHY did they do through the trouble to do this? I didn't think that CR-18 had that much traffic.
I want to say there are parts of I-90 in western Montana that are 1 lane and only seperated by a double yellow line, but it's been a long time.
Quote from: froggie on February 05, 2009, 05:16:43 PM
I-90 in western Montana's 2 lanes each way. At one point they were separated by a double yellow line, but word is that the state put in a Jersey barrier sometime within the past decade or so.
(//www.aaroads.com/forum_images/rockies/i-090_wb_exit_000.jpg)
Indeed it is now a jersey barrier median.
Does not I-83 in Harrisburg, PA at the I-283 have it narrow down to single lane?
Yes as well as on the western shore where it intersects PA 581.
WB I-96 drops to one lane briefly at Exit 30 north of Grand Rapids.
http://maps.google.com/maps?hl=en&ie=UTF8&ll=43.016948,-85.681643&spn=0,0.028067&z=16&layer=c&cbll=43.016861,-85.682801&panoid=9e0lswYQwgb8bskomi_03g&cbp=12,263.78,,0,8.46
The left lane is mainline I-96 while the right lane is an exit only lane to SB Alpine Ave. Coming in from the left is two lanes from US-131, one of which ends between this interchange and the next interchange, resulting in two travel lanes westbound.
I-70 eastbound in Kansas City, Kan. narrows to one lane.
To continue on I-80 going eastbound just east of the Indiana-Illinois state line, you have to exit from I-94 onto a one-lane ramp, and then onto I-90. The ramp does briefly become two-lane with the westbound I-94 ramp. Same goes for the interchange in the opposite direction.
41.589142N, 87.233052 W
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Trenton+NJ&aq=&sll=40.184144,-74.716581&sspn=0.00382,0.010504&gl=us&ie=UTF8&hq=&hnear=Trenton,+Mercer,+New+Jersey&ll=40.183923,-74.716387&spn=0.030295,0.084028&t=h&z=14&layer=c&cbll=40.184144,-74.716581&panoid=gf22INXv1iyRdmMYu6inUQ&cbp=12,277.49,,0,0.28
Interstate 195 in NJ, the future path will take it up the ramp on the right to continue north to where 295 and 95 meet at US1
Seems there are multiple threads for this...
Quote from: vtk on July 02, 2011, 09:01:43 PM
I-71 is routed through a single-lane ramp each way through the Mound-Sandusky (West Split) Interchange (Jct I-70 & OH-315) in Columbus. I-70 Westbound is forced into a single lane just before joining I-71 Southbound in the East Split Interchange; there's another lane there but it's Exit Only for 4th Street. Both of these situations are supposed to be rectified as the I-70/71 project takes its course, giving I-70 and I-71 three and two through lanes each way, respectively. (Or so says the overall description -- for some reason, the actual plans show only two through lanes westbound on I-70 through both major interchanges...)
Also, I think NB I-71 narrows to a single lane just before merging with I-75 in northern Kentucky. Now why couldn't they have let the two Interstates join, and then drop a lane a bit downstream?
Not an interstate, some Quebec autoroutes do the same thing.
At Longueuil, A-20 eastbound when it left the PQ-132 multiplex at the junction of TCH-25
http://maps.google.com/?ll=45.577125,-73.477818&spn=0.002628,0.013733&z=17&layer=c&cbll=45.577124,-73.477815&panoid=o1wIjszAaRxm3LKCSXvGQg&cbp=11,59.48,,0,1.69
and at the junction of A-10
both A-20 and A-15 left the multiplex with PQ-132 to reach A-10 and Champlain bridge with one lane ramp
http://maps.google.com/?ll=45.475533,-73.500059&spn=0.002633,0.013733&z=17&layer=c&cbll=45.475531,-73.500063&panoid=z8GVF9-p0LqOIl6XK9BHKg&cbp=11,152.72,,0,2.25
A-55 northbound at Magog, when it begin a multiplex with A-10
http://maps.google.com/?ll=45.291222,-72.123871&spn=0.010567,0.054932&z=15&layer=c&cbll=45.291227,-72.123876&panoid=gfghwn76Ps_9pRQ1a9sWqw&cbp=11,307.42,,0,4.15
A-55 do it again later, on both directions between Drummondville and Ste-Eulalie when it got multiplexed with TCH-20
http://maps.google.com/?ll=46.091418,-72.248712&spn=0.010417,0.054932&z=15&layer=c&cbll=46.091426,-72.248706&panoid=SLiVlRpQYXd66CGNIk_lxQ&cbp=11,50.81,,0,3.23
* EB I-94 where it leaves the Tri-State and merges with US 41:
http://maps.google.com/maps?hl=en&ll=42.135913,-87.788744&spn=0.053655,0.132093&z=14&layer=c&cbll=42.145379,-87.796593&panoid=Ue9GubIoLHbDp0UW_dHzHQ&cbp=12,116.11,,0,2.22 (http://maps.google.com/maps?hl=en&ll=42.135913,-87.788744&spn=0.053655,0.132093&z=14&layer=c&cbll=42.145379,-87.796593&panoid=Ue9GubIoLHbDp0UW_dHzHQ&cbp=12,116.11,,0,2.22)
Traffic wise, this design is horrible.
Maybe I'm remembering wrong but how about Glenwood Canyon in Colorado?
Quote from: texaskdog on July 05, 2011, 02:09:14 PM
Maybe I'm remembering wrong but how about Glenwood Canyon in Colorado?
You're remembering wrong. I went through there in October, and the whole thing was two lanes in each direction.
Quote from: Revive 755 on July 04, 2011, 09:08:28 PM
* EB I-94 where it leaves the Tri-State and merges with US 41:
http://maps.google.com/maps?hl=en&ll=42.135913,-87.788744&spn=0.053655,0.132093&z=14&layer=c&cbll=42.145379,-87.796593&panoid=Ue9GubIoLHbDp0UW_dHzHQ&cbp=12,116.11,,0,2.22 (http://maps.google.com/maps?hl=en&ll=42.135913,-87.788744&spn=0.053655,0.132093&z=14&layer=c&cbll=42.145379,-87.796593&panoid=Ue9GubIoLHbDp0UW_dHzHQ&cbp=12,116.11,,0,2.22)
Traffic wise, this design is horrible.
Yes, it is bad, but you have two lanes from the Spur merging with two lanes from the Edens here, and the Edens has three lanes. The Edens could use another lane until the next exit and eliminate this problem. Thank IDiOT for that fuckup.
yeah i believe it was just the road decks one over the other, i believe youre right it was 2 lanes each way, just tight
Quote from: Stephane Dumas on July 02, 2011, 09:33:40 PM
Not an interstate, some Quebec autoroutes do the same thing.
and at the junction of A-10
both A-20 and A-15 left the multiplex with PQ-132 to reach A-10 and Champlain bridge with one lane ramp
http://maps.google.com/?ll=45.475533,-73.500059&spn=0.002633,0.013733&z=17&layer=c&cbll=45.475531,-73.500063&panoid=z8GVF9-p0LqOIl6XK9BHKg&cbp=11,152.72,,0,2.25
This one should get a special honorable mention, because not only does it narrow to one lane ramps twice (bridge ramps and slip ramps from the QC 132 freeway), but it utilizes a frontage road that isn't even a freeway! Though I suppose that is allowed in Quebec (for example, A-20).
Does I-93 in New Hampshire still narrow to one lane in each direction through Franconia Notch?
Quote from: MeanMeosh on July 11, 2011, 06:36:18 PM
Does I-93 in New Hampshire still narrow to one lane in each direction through Franconia Notch?
it did the last time I was there, which was April, 2008.
I do not remember if that segment is considered I-93, or a gap in the route. I can never remember.
It is I-93 AFAIK. And it's still one lane per direction AFAIK.
Quote from: roadman65 on May 15, 2011, 07:26:38 PM
Does not I-83 in Harrisburg, PA at the I-283 have it narrow down to single lane?
Quote from: PAHighways on May 15, 2011, 10:03:31 PM
Yes as well as on the western shore where it intersects PA 581.
I-83 is one lane in both directions through both the I-283 and the PA 581 interchanges--approximately 4-1/2 miles apart. In addition, at each interchange I-83 in one of its directions uses an offramp to continue.
Southbound on I-83 at PA 581, one has to exit the mainline to the right to continue on I-83 (through a single-lane trumpet interchange). The mainline continues west with two lanes as PA 581.
Northbound on I-83 at the interchange with I-283 and US 322 (the infamous Eisenhower Interchange), one has to exit the mainline to the left to continue on I-83 (using a single-lane flyover ramp). The mainline continues east with two lanes as US 322.
Not as remarkable, since it's a termination point, but worthy of mentioning I suppose: I-283 begins/ends at the Eisenhower Interchange; it is one lane in both directions to and from every connection with both I-83 and US 322 (six one-lane ramps).
Quote from: Dr Frankenstein on July 11, 2011, 07:43:02 PM
It is I-93 AFAIK. And it's still one lane per direction AFAIK.
Yes and yes, according to Google Street View, anyway.
Quote from: Dr Frankenstein on July 11, 2011, 07:43:02 PM
It is I-93 AFAIK. And it's still one lane per direction AFAIK.
Yes. Used to be signed as "US 3, Franconia Notch Parkway, to I-93", but is now signed "I-93/US 3, Franconia Notch Parkway".
Westbound I-70 drops to one lane at the tunnel in Wheeling, WV.
Until it is rebuilt (soon, I have seen the plans), I-55 at the east end of its Mississippi River bridge in Memphis goes through one-lane ramps while making that turn at the cloverleaf interchange.
I-43 follows one-lane ramps in both directions through the Hale Interchange (US 45/I-894 splits) in Greenfield (suburban Milwaukee), WI.
Mike
Inbound (northbound) I-395 VERY briefly narrows to one lane as it goes around the ramp from the Southwest-Southeast Freeway onto what used to be known as the Center Leg Freeway (more commonly called the 3d Street Tunnel these days). The single-lane distance is rather minuscule, but it's there.
I-76 EB in Philadelphia, PA, is 3 lanes approaching interchange #347. The left (Penrose Av to I-95 SB [347 A]) and center (Passyunk Av [347 B]) lanes are unlabeled "exit only", and all thru traffic must merge into the right lane. Before one is completely thru this interchange, each route has already expanded to 2 lanes, but I-76 is briefly signed and striped as a 1-lane mainline.
All the Interstates in Alaska
I believe I-95 south in the Bruckner interchange in NYC has a one lane portion.
Quote from: deanej on July 20, 2011, 12:21:47 PM
I believe I-95 south in the Bruckner interchange in NYC has a one lane portion.
It is very short but it counts. I-95 squeezes to one lane after the split and exit for I-278 and I-678. Then a lane joins on the left from I-678 to make 2 lanes, and 2 lanes join on the left to make 4 lanes, and then the right lane ends (the one coming from I-95!) to make 3 on the Cross Bronx.
Quote from: mtantillo on July 20, 2011, 03:46:37 PM
Quote from: deanej on July 20, 2011, 12:21:47 PM
I believe I-95 south in the Bruckner interchange in NYC has a one lane portion.
It is very short but it counts. I-95 squeezes to one lane after the split and exit for I-278 and I-678. Then a lane joins on the left from I-678 to make 2 lanes, and 2 lanes join on the left to make 4 lanes, and then the right lane ends (the one coming from I-95!) to make 3 on the Cross Bronx.
Excellent planning, they took a page out of the CT planning book.
Quote from: qguy on July 11, 2011, 08:22:08 PM
Southbound on I-83 at PA 581, one has to exit the mainline to the right to continue on I-83 (through a single-lane trumpet interchange). The mainline continues west with two lanes as PA 581.
Unless this has changed recently, it's two lanes southbound.
Here's a mostly-complete list (not counting the end of a route, and not counting cases where there is more than one roadway in the same direction e.g. local and express lanes):
On a freeway mainline
*I-8 east at I-5, San Diego, CA
*I-70 west at I-695, Baltimore, MD (practically the end)
*I-81 south at I-690, Syracuse, NY
*I-81, Thousand Islands Bridge, NY
*I-93, Franconia Notch, NH
*I-394 west at I-94, Minneapolis, MN
*I-670 east at I-35, Kansas City, MO
*I-705 north at SR 509, Tacoma, WA
On a ramp (broadly defined)
*I-10 at I-35/US 90, San Antonio, TX
*I-15 south at I-84, Tremonton, UT
*I-15 at I-90, west of Butte, ID
*I-15 at I-90, Butte, ID
*I-24 east at I-65, northern Nashville, TN
*I-26 (future) at I-240, Asheville, NC
*I-29 south at I-35, Kansas City, MO (practically the end)
*I-35 at I-40, downtown Oklahoma City, OK
*I-35 at I-335, Emporia, KS
*I-35 at I-70, Kansas City, MO
*I-35 at I-70/US 71, Kansas City, MO
*I-35 at I-80/I-235, northern Des Moines, IA
*I-39 at US 20, Rockford, IL
*I-39 at I-90, Rockford, IL
*I-40 east at I-55, West Memphis, AR
*I-40 east at I-240, downtown Memphis, TN
*I-40 at I-240, eastern Memphis, TN
*I-43 at I-894, southwest of Milwaukee, WI
*I-44 at SH 74, northwestern Oklahoma City, OK
*I-44 at I-35, northeastern Oklahoma City, OK
*I-55 at I-240, Memphis, TN
*I-55 at Crump Boulevard, Memphis, TN
*I-55 at I-64/I-70, St. Louis, MO
*I-64 at I-81, Lexington, VA
*I-64 at I-81, Staunton, VA
*I-64 at I-95, Richmond, VA
*I-66 at US 50, Washington, DC
*I-69 at I-55, Hernando, MS
*I-69 east at I-96 (north junction), Lansing, MI
*I-69 at I-94, Port Huron, MI (practically the end)
*I-70 east at Fairfax Trafficway, Kansas City, KS
*I-70 east at I-35/US 71, Kansas City, MO
*I-70 at I-670/US 71, Kansas City, MO
*I-70 at I-55/I-64, St. Louis, MO
*I-70 at WV 2, Wheeling, WV
*I-70 at I-76, New Stanton, PA
*I-70 west at I-76, Breezewood, PA
*I-71 south at I-75, Walton, KY
*I-71 at I-70/SR 315, Columbus, OH
*I-72 at I-55, eastern Springfield, IL
*I-73 north at I-85, Greensboro, NC
*I-74 at I-280, Moline, IL
*I-74 at I-80, Colona, IL
*I-74 at I-55, Normal, IL
*I-74 at I-465, western Indianapolis, IN
*I-74 at I-465, eastern Indianapolis, IN
*I-74 west at I-275 (east junction), northwest of Cincinnati, OH
*I-75 at I-275/I-640, Knoxville, TN
*I-76 at I-277, Akron, OH
*I-76 at I-77 (west junction), Akron, OH
*I-76 at I-80, Austintown, OH
*I-76 west at I-276, Valley Forge, PA
*I-76 east at PA 291, Philadelphia, PA
*I-77 at I-81, Fort Chiswell, VA
*I-77 at I-76 (east junction), Akron, OH
*I-79 at I-70 (west junction), Washington, PA
*I-79 at I-70 (east junction), Washington, PA
*I-80 east at I-76, Big Springs, NE
*I-80 at I-74, Colona, IL
*I-80 at I-90/I-94, Portage, IN
*I-80 east at I-76, Austintown, OH
*I-83 north at PA 581, Lemoyne, PA
*I-83 at I-283, Harrisburg, PA
*I-84 at I-86, Burley, ID
*I-84 west at I-15, Ogden, UT
*I-87 south at I-90, Albany, NY
*I-90 at I-94, Billings, MT
*I-90 at I-80, Elyria, OH
*I-90 at SR 2, Elyria, OH
*I-90 at Berkshire Thruway, southeast of Albany, NY
*I-94 west at I-43/I-794, Milwaukee, WI
*I-94 east at US 41, Glencoe, IL
*I-95 at PA Turnpike extension, Mansfield, NJ
*I-95 south at I-278/I-295, Bronx, NY
*I-95 north at I-93, Canton, MA
*I-185 at I-85, Greenville, SC
*I-215 north at SR 60/SR 91, Riverside, CA
*I-278 at I-95, Elizabeth, NJ
*I-278 at Grand Central Parkway, Queens, NY
*I-278 east at I-87, Bronx, NY
*I-279 north, downtown Pittsburgh, PA
*I-293 at NH 101/Everett Turnpike, Manchester, NH
*I-295 south at DC 295, Anacostia, DC
*I-376 at US 422, New Castle, PA
*I-395 north at I-695, Washington, DC
*I-410 CW at I-35 (north junction), San Antonio, TX
*I-410 CCW at I-35 (south junction), San Antonio, TX
*I-435 at I-29 (north junction), north of Kansas City, MO
*I-435 CCW at I-29 (south junction), north of Kansas City, MO
*I-470 at I-335, Topeka, KS
*I-475 south at US 23, west of Toledo, OH
*I-480 west at I-271/US 422, Bedford Heights, OH
*I-496 east at US 127, Lansing, MI
*I-540 at I-40, Van Buren, AR
*I-540 at I-40, Alma, AR
*I-676 west at 8th Street, Philadelphia, PA
*I-680 at I-29, Crescent, IA
*I-680 at I-29, Missouri Valley, IA
*I-787 south at NY 7/NY 787, Troy, NY
*I-790 east at NY 49, Utica, NY
*I-820 CW at SH 121/SH 183, northeast of Fort Worth, TX
Quote from: NE2 on August 09, 2011, 07:45:27 PM
Here's a mostly-complete list (not counting the end of a route, and not counting cases where there is more than one roadway in the same direction e.g. local and express lanes):
On a ramp (broadly defined)
*I-39 south at I-90/I-94, Portage, WI
I-39 is two-lanes in both directions through the Cascade interchange (I-90/94 split) near Portage, WI.
Mike
You're right - it looked like one on aerials.
I-96 WB at Alpine Ave in Comstock Park, MI is one lane for a short while.
Quote from: ftballfan on August 09, 2011, 10:28:45 PM
I-96 WB at Alpine Ave in Comstock Park, MI is one lane for a short while.
Looks to be clearly two lanes.
The right lane is exit only, but the exit comes after another lane merges in on the left from US 131 north. A single white line appears between the lanes before the left entrance, but since you're allowed to cross the line ("not recommended" (http://www.michigan.gov/documents/SOS_WEDMK_7_Signs_Pavement_Markings_and_Signals_158269_7.pdf) in Michigan) it's two lanes. Unless you want to call any one-lane ramp that becomes an exit only lane zero lanes...?
Westbound I-94 narrows to one lane as it passes through the rebuilt Marquette Interchange in Milwaukee. Before the rebuild, it was one lane through that interchange in both directions.
Mike
Quote from: NE2 on August 09, 2011, 07:45:27 PM
Here's a mostly-complete list (not counting the end of a route, and not counting cases where there is more than one roadway in the same direction e.g. local and express lanes):
On a ramp (broadly defined)
*I-61 at I-81, Lexington, VA
I hope you mean I-64.
I-90 WB to Dan Ryan (I-90/94) NB in Chicago, Actually 2 one lane ramps - 1 to the express lanes one to the local lanes. I can understand why this isn't counted, but it's close since one cannot pass. Also at the Edens Junction, the Reversible entry/exit lanes to/from the Edens and Kennedy mainline are single-lane, but I definitely wouldn't count those since they're just a split lane.
Quote from: mgk920 on August 11, 2011, 11:06:41 AM
Westbound I-94 narrows to one lane as it passes through the rebuilt Marquette Interchange in Milwaukee. Before the rebuild, it was one lane through that interchange in both directions.
Mike
Ah yes. The two-lane ramp narrows to one. Added.
Quote from: NE2 on August 11, 2011, 10:56:34 AM
The right lane is exit only, but the exit comes after another lane merges in on the left from US 131 north. A single white line appears between the lanes before the left entrance, but since you're allowed to cross the line ("not recommended" (http://www.michigan.gov/documents/SOS_WEDMK_7_Signs_Pavement_Markings_and_Signals_158269_7.pdf) in Michigan) it's two lanes. Unless you want to call any one-lane ramp that becomes an exit only lane zero lanes...?
My thoughts exactly.
Quote from: mgk920 on August 09, 2011, 09:02:47 PM
Quote from: NE2 on August 09, 2011, 07:45:27 PM
Here's a mostly-complete list (not counting the end of a route, and not counting cases where there is more than one roadway in the same direction e.g. local and express lanes):
On a ramp (broadly defined)
*I-39 south at I-90/I-94, Portage, WI
I-39 is two-lanes in both directions through the Cascade interchange (I-90/94 split) near Portage, WI.
Mike
IIRC, it is also 2 lanes in each direction now at the Cherry Valley Interchange in Rockford since the rebuild.