Hey everyone, I'm curious to see what sort of radii are used across the country for loop ramps. Let's see how small they'll go! It's ok if it is leading to a CD system, too. Let's see those Google locations!
One of my favorites from México:
http://goo.gl/maps/zyxpZ (http://goo.gl/maps/zyxpZ)
That one might be tough to beat haha! For some reason that reminded me of this one:
http://goo.gl/maps/Y8UAO
Here's one near Inkster, Michigan. Think it has been posted on this forum on another thread recently:
http://maps.google.com/maps?ll=42.299465,-83.271759&z=17&t=h&hl=en
Exit from I-895 (Baltimore Harbor Tunnel Thruway) southbound to Southbound Md. 2 (Potee Street) (Exit 7 (https://maps.google.com/maps?q=baltimore,+md&hl=en&ll=39.240056,-76.610788&spn=0.004678,0.009645&sll=39.240962,-76.609983&sspn=0.00929,0.01929&t=k&hnear=Baltimore,+Maryland&z=17)) is pretty sharp.
And there is this interchange of I-495 (Capital Beltway) at Md. 97 (Georgia Avenue) in Silver Spring, Maryland has three sharp loop ramps (Exit 31 (https://maps.google.com/maps?q=silver+spring+md&hl=en&ll=39.013399,-77.041948&spn=0.004693,0.009645&sll=39.240056,-76.610788&sspn=0.004678,0.009645&t=k&hnear=Silver+Spring,+Montgomery,+Maryland&z=17)).
Here are some I've found—
http://goo.gl/maps/Ve3Wf US 22 & PA 145
http://goo.gl/maps/Oqw75 I 80 & I 81
Not a loop ramp, but still; http://goo.gl/maps/BIA5s
http://goo.gl/maps/mfGWg GSP at US 1
http://goo.gl/maps/7gyI2 US 22 at PA 611
http://goo.gl/maps/ZcQkm US 22 at Fullerton Ave (you can tell from my selections that The Lehigh Valley Thruway has a lot of tight ramps :banghead:)
http://goo.gl/maps/NVhU2 PA 581 and US 15
Quote from: tradephoric on November 27, 2012, 09:23:18 PM
Here's one near Inkster, Michigan. Think it has been posted on this forum on another thread recently:
http://maps.google.com/maps?ll=42.299465,-83.271759&z=17&t=h&hl=en
I think I posted it as a "best of" in the sense of aesthetics and intrigue. Anyway, I can't beat it, but here are some in NJ (https://maps.google.com/maps?hl=en&ll=40.730389,-74.108797&spn=0.002012,0.004597&sll=37.6,-95.665&sspn=34.239814,75.322266&t=k&z=18).
EDIT: MORE (https://maps.google.com/?ll=40.685276,-74.328121&spn=0.001904,0.004597&t=k&z=18)
Here's one at a trumpet, constrained by the Niagara Escarpment: http://maps.google.com/maps?hl=en&ll=43.235195,-79.828463&spn=0.003564,0.008256&gl=us&t=k&z=18
Quote from: NE2 on November 27, 2012, 11:32:43 PM
Here's one at a trumpet, constrained by the Niagara Escarpment: http://maps.google.com/maps?hl=en&ll=43.235195,-79.828463&spn=0.003564,0.008256&gl=us&t=k&z=18
Holy cow...check out this little junction to the southeast! http://goo.gl/maps/kGdU1 (http://goo.gl/maps/kGdU1) Don't think I've ever seen anything like THAT before!
http://goo.gl/maps/wH2gM This I-5 on-ramp annoys me to the point where I hardly ever use it.
Quote from: johndoe on November 28, 2012, 12:08:56 AM
Holy cow...check out this little junction to the southeast! http://goo.gl/maps/kGdU1 (http://goo.gl/maps/kGdU1) Don't think I've ever seen anything like THAT before!
I-10/I-20 is just like that with a bridge (and a lot bigger) :bigass:
How about this one on CA 110... http://goo.gl/maps/gQZAY
Seemingly nearly every trumpet interchange on the PA Turnpike would qualify. One of the tightest ones is the I-76 (Schuykill Expressway) to I-76 (PA Turnpike) ramp in the King of Prussia Area. http://goo.gl/maps/RFF5h
I haven't attempted to click through every link in this thread, so apologies if this has already been posted. The Merritt Parkway in Connecticut has a bunch of tight ramps and this one is a loop-around without an acceleration lane: http://goo.gl/maps/NOMHm
Another from further east: http://goo.gl/maps/vI0M7
Going from Cropsey Avenue to the Belt Parkway in Brooklyn....at least there's an acceleration lane: http://goo.gl/maps/1MkLS
Watch and learn, rest of the country:
http://goo.gl/maps/ZT07B MA 128/1A
http://goo.gl/maps/WH14G MA 128/35 (note, reconstructed as a diamond, opened this summer)
http://goo.gl/maps/rDLC7 MA 128/Lowell St
http://goo.gl/maps/OpFPR US 1/Walnut St
http://goo.gl/maps/KrlFK US 1/Main St
http://goo.gl/maps/0qGzM US 1/Essex St
http://goo.gl/maps/O3nQX US1/Salem St (this one's a bit of a stretch)
http://goo.gl/maps/vl8cL Riverway/Jamaicaway/MA 9
http://goo.gl/maps/PWVE8 MA 9/Weston Rd
http://goo.gl/maps/7CBBU MA9/27
http://goo.gl/maps/Jo1Pn MA9/30/126 (this one's also a bit of a stretch)
http://goo.gl/maps/cxtZN MA9/85
http://goo.gl/maps/n10yq MA146/Elm St
http://goo.gl/maps/RN7DQ MA2/12
Quote from: deathtopumpkins on November 28, 2012, 10:04:52 AM
http://goo.gl/maps/ZT07B MA 128/1A
Surprised they wouldn't configure the lanes more like this.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FH6QuY.jpg&hash=95a96f4ebf25619481ba1ebf5d9b20a9ec0c8216)
North-bound Dodge Street is already one lane (look @ bottom) ... why make it two lanes after the intersection and then force all the people on the loop ramp (look at em all! the whole ramp is clogged) with people who have to Yield/stop for people for nearly no reason. What I drew is a little more free flow from what I can tell from the current situation they got going on there.
It's Massachusetts. It's not supposed to make sense.
Seriously though, that would make much more sense. I take that ramp frequently when visiting my mother in Ipswich, and it's almost impossible to pull out onto 1A because people don't know whether northbound traffic will end up in the right or left lane. And yes, traffic usually backs up the whole length of the ramp. Last time I drove it exiting traffic on 128 actually backed up in the right lane to before the onramp from 1A southbound.
Quote from: colinstu on November 28, 2012, 10:21:21 AM
Quote from: deathtopumpkins on November 28, 2012, 10:04:52 AM
http://goo.gl/maps/ZT07B MA 128/1A
Surprised they wouldn't configure the lanes more like this.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FH6QuY.jpg&hash=95a96f4ebf25619481ba1ebf5d9b20a9ec0c8216)
North-bound Dodge Street is already one lane (look @ bottom) ... why make it two lanes after the intersection and then force all the people on the loop ramp (look at em all! the whole ramp is clogged) with people who have to Yield/stop for people for nearly no reason. What I drew is a little more free flow from what I can tell from the current situation they got going on there.
Yup. They could even make it a part-time thing depending on how the traffic is at different times of day. That's done in the District of Columbia during rush hours near the Lincoln Memorial (see here: http://binged.it/Y5cgkK –Google's image shows the road under construction and is confusing). Notice the sawhorse sitting in the grass near the end of the ramp. During rush hour they put out that sawhorse and some traffic cones to allow traffic coming down the ramp to continue without slowing to yield. But some dummies insist on stopping to yield anyway and it's damn annoying! If you zoom out slightly–for me it was two clicks of the scrolly wheel thing on my mouse–you'll see what happens when they don't put out the cones.
Guess I'll go ahead and contribute a little.
http://goo.gl/maps/1T8Ke Silver Spring Rd and & Sherman Blvd... ugly and one of the ramps is pretty darn small.
http://goo.gl/maps/oeTsd could be a stretch... (Brown Deer Rd & I-43)
Trying to think of some more in WI... can't think of any more currently, but I mostly concentrate on South East WI.
Quote from: colinstu on November 28, 2012, 10:21:21 AM
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FH6QuY.jpg&hash=95a96f4ebf25619481ba1ebf5d9b20a9ec0c8216)
You mean make it one-lane from the NB off-ramp to the loop ramp merge, and have the loop make the second lane?
That would be better. :nod:
Quote from: Roadsguy on November 28, 2012, 11:13:16 AMYou mean make it one-lane from the NB off-ramp to the loop ramp merge, and have the loop make the second lane?
That would be better. :nod:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.trafficsign.us%2F100%2Fwarn%2Fw4-3.gif&hash=842c47c927344e1b791f484cca5196cd7d888ea9)
Yep. Added lane :)
Quote from: johndoe on November 28, 2012, 12:08:56 AM
Quote from: NE2 on November 27, 2012, 11:32:43 PM
Here's one at a trumpet, constrained by the Niagara Escarpment: http://maps.google.com/maps?hl=en&ll=43.235195,-79.828463&spn=0.003564,0.008256&gl=us&t=k&z=18
Holy cow...check out this little junction to the southeast! http://goo.gl/maps/kGdU1 (http://goo.gl/maps/kGdU1) Don't think I've ever seen anything like THAT before!
Both of those are excellent examples!
I forgot about this Mexican example: http://goo.gl/maps/tvhnp (http://goo.gl/maps/tvhnp)
And here's the signage on the freewawy: http://goo.gl/maps/Vyj3x (http://goo.gl/maps/Vyj3x) (translation: DANGEROUS EXIT/SLOW DOWN)
What's amazing is that it's an interchange between two toll roads–one going between Acapulco and México City, and the other leading to Taxco (a tourist destination). In fact, using that ramp is probably the fastest way to get from Acapulco to Taxco.
The cloverleaf ramps at the Route 1/Junipero Serra Freeway interchange with Brotherhood Way in San Francisco are extremely compact:
https://maps.google.com/maps?q=San+Francisco&hl=en&ll=37.712798,-122.471056&spn=0.00229,0.002376&sll=34.093051,-118.208588&sspn=0.006779,0.009506&hnear=San+Francisco,+California&t=k&z=19
The Westbound Blvd of the Allies ramp to the Liberty Bridge is pretty tight:
http://maps.google.com/maps?q=15222&hl=en&ll=40.436634,-79.994451&spn=0.001822,0.00284&sll=41.117935,-77.604698&sspn=5.221572,11.634521&t=h&hnear=Pittsburgh,+Pennsylvania+15222&z=19 (http://maps.google.com/maps?q=15222&hl=en&ll=40.436634,-79.994451&spn=0.001822,0.00284&sll=41.117935,-77.604698&sspn=5.221572,11.634521&t=h&hnear=Pittsburgh,+Pennsylvania+15222&z=19)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fmysite.verizon.net%2Fvze3kr2y%2Fsitebuildercontent%2Fsitebuilderpictures%2FBlvd_Allies_loop_ramp.jpg&hash=4008def9090146bf71ddbd69461feee9928e3f89)
(North is @ the bottom)
Another San Francisco example I found, the ramp for Exit 2B off of Interstate 80 westbound, to Harrison Street (which is kinda redundant with the less-challenging Fremont Street ramp nearby).
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784753,-122.392416&spn=0.003235,0.004753&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=18
20 MPH advisory speed!
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784765,-122.392827&spn=0.000809,0.001188&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=20&layer=c&cbll=37.784765,-122.392827&panoid=utSATZktBDrj6whW9AQJ6w&cbp=12,216.26,,0,4.06
A few miles to the south is this ramp from Interstate 280 south to Pennsylvania Avenue northbound:
https://maps.google.com/maps?q=18th+St+%26+Pennsylvania+Ave,+San+Francisco&hl=en&ll=37.763424,-122.393513&spn=0.002288,0.002376&sll=37.763446,-122.392915&sspn=0.002288,0.002376&t=h&hnear=18th+St+%26+Pennsylvania+Ave,+San+Francisco,+California+94107&z=19
Quote from: TheStranger on November 28, 2012, 03:06:47 PM
20 MPH advisory speed!
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784765,-122.392827&spn=0.000809,0.001188&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=20&layer=c&cbll=37.784765,-122.392827&panoid=utSATZktBDrj6whW9AQJ6w&cbp=12,216.26,,0,4.06
I can beat that...
15 MPH advisory speed!
http://goo.gl/maps/j8ifv
Here:
http://goo.gl/maps/EbUj8
Quote from: kj3400 on November 28, 2012, 04:26:37 PM
Quote from: TheStranger on November 28, 2012, 03:06:47 PM
20 MPH advisory speed!
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784765,-122.392827&spn=0.000809,0.001188&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=20&layer=c&cbll=37.784765,-122.392827&panoid=utSATZktBDrj6whW9AQJ6w&cbp=12,216.26,,0,4.06
I can beat that...
15 MPH advisory speed!
http://goo.gl/maps/j8ifv
Here:
http://goo.gl/maps/EbUj8
Same here:
http://goo.gl/maps/bgfA3 US 22 & PA 145
http://goo.gl/maps/Cz9R8 US 22 & PA 512 (these interchanges are within 5 miles of each other)
Here's a nasty cloverleaf ramp in Rosemead, at the junction of Interstate 10/San Bernardino Freeway and Route 19/Rosemead Boulevard:
https://maps.google.com/maps?q=Rosemead+Blvd+%26+Glendon+Way&hl=en&ll=34.073119,-118.073545&spn=0.004795,0.004753&sll=34.073038,-118.073249&sspn=0.00241,0.002376&t=h&hnear=Rosemead+Blvd+%26+Glendon+Way,+Rosemead,+Los+Angeles,+California+91770&z=18
Another one on I-10 further west, at Atlantic Boulevard in Alhambra:
https://maps.google.com/maps?q=Glendon+Way+%26+Atlantic+Blvd&hl=en&ll=34.071183,-118.134367&spn=0.000426,0.000594&sll=34.071396,-118.131351&sspn=0.027266,0.038023&hnear=S+Atlantic+Blvd+%26+W+Glendon+Way,+Alhambra,+Los+Angeles,+California+91803&t=m&z=21&layer=c&cbll=34.071183,-118.134367&panoid=w_UfY3Un-PLcNdBMG83Rrg&cbp=12,134.81,,0,4.67
These are two of seven straight tiny-ramp-cloverleaf interchanges between Exit 23A and Exit 26B. Ouch.
Further west in metro Los Angeles, is this interchange constrained by the Los Angeles River, Interstate 710/Long Beach Freeway at Willow Street in Long Beach:
https://maps.google.com/maps?q=Willow+Street+%26+Long+Beach+Freeway&hl=en&ll=33.804122,-118.20699&spn=0.006802,0.009506&sll=33.804603,-118.207353&sspn=0.003419,0.004753&hnear=W+Willow+St+%26+Long+Beach+Fwy,+Long+Beach,+Los+Angeles,+California+90810&t=h&z=17
15 MPH advisory speed there!
Also in Long Beach is the junction of Route 103 and Route 1, with a 20 MPH advisory speed for the loop from Route 103 south to Route 1 south:
https://maps.google.com/maps?q=Terminal+Island+Fwy+%26+Pacific+Coast+Hwy&hl=en&ll=33.789349,-118.22436&spn=0.006803,0.009506&sll=33.789839,-118.22481&sspn=0.004836,0.004753&t=h&hnear=W+Pacific+Coast+Hwy+%26+Terminal+Island+Fwy,+Long+Beach,+Los+Angeles,+California+90813&z=17
I remembered this (https://maps.google.com/maps?q=Thomas+Road+at+I-20,+West+Monroe,+LA&hl=en&ll=32.505303,-92.157199&spn=0.003353,0.005252&sll=34.103609,-118.19169&sspn=0.003292,0.005252&t=h&gl=us&hnear=Thomas+Rd+%26+Interstate+20,+West+Monroe,+Ouachita,+Louisiana+71291&z=18) being a little tighter and slower. Thomas Road (LA 617) at I-20 (specifically, WB I-20 to NB LA 617), West Monroe, LA
Couple I can think of off the top of my head:
I-684 N to I-84 E ramp in Brewster, NY:. Not a full cloverleaf, but the 20 MPH curve just before the merge onto 84 is almost at a right angle, and is very deceptive. If you don't make the curve, you're going perpendicular across the lanes of heavy 84 traffic.
Several on the Merritt/Wilbur Cross Parkways in CT, but the sharpest has to be the Exit 61 NB off ramp onto Whitney Ave. You basically go 175 degrees on a hairpin in about 75 ft.
How about PA 611 and I-76? There are actually two tight ramps.
https://maps.google.com/maps?q=3101+S+Broad+St,+Philadelphia,+PA&hl=en&oq=3101+S+Broad+&t=h&hnear=3101+S+Broad+St,+Philadelphia,+Pennsylvania+19148&z=16
Quote from: kj3400 on November 28, 2012, 04:26:37 PM
Quote from: TheStranger on November 28, 2012, 03:06:47 PM
20 MPH advisory speed!
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784765,-122.392827&spn=0.000809,0.001188&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=20&layer=c&cbll=37.784765,-122.392827&panoid=utSATZktBDrj6whW9AQJ6w&cbp=12,216.26,,0,4.06
I can beat that...
15 MPH advisory speed!
http://goo.gl/maps/j8ifv
Here:
http://goo.gl/maps/EbUj8
That's a good one.
I think I recall reading that this interchange was on the list for an eventual total reconstruction by SHA. It needs it.
Scenic Highway/Airline Highway interchange (US 61 and 190) in north Baton Rouge when nearly brand new in 1941, more or less unchanged to this day:
http://www.flickr.com/photos/77396241@N02/8227839607/in/photostream (http://www.flickr.com/photos/77396241@N02/8227839607/in/photostream)
A notable one I deal with regularly: https://maps.google.com/?ll=40.690246,-74.268493&spn=0.001007,0.002299&t=k&z=19 (15 MPH)
Just north of there: https://maps.google.com/?ll=40.693933,-74.260854&spn=0.001015,0.002299&t=k&z=19 (don't believe any speed is posted)
Quote from: Urban Prairie Schooner on November 28, 2012, 09:19:57 PM
Scenic Highway/Airline Highway interchange (US 61 and 190) in north Baton Rouge when nearly brand new in 1941, more or less unchanged to this day:
http://www.flickr.com/photos/77396241@N02/8227839607/in/photostream (http://www.flickr.com/photos/77396241@N02/8227839607/in/photostream)
What's crazy about that: Looked to be a LOT of available land for a better layout back then! Seems like preservation of the Monte Sano Avenue alignment was the priority in that design.
Page Mill Road at Alma Street, Palo Alto, CA: radius == about 25 meters: http://goo.gl/maps/fHRa0
I-295, Interchanges 15 & 16A both have very tight radii and 15mph advisory speeds.
Aerial Image: http://goo.gl/maps/jlp1I
Road Image: (Exit 15): http://goo.gl/maps/ILEZm , (Exit 16A): http://goo.gl/maps/CX8R5 (and the one and only sign is after the ramp leaves the mainline!)
Quote from: kj3400 on November 28, 2012, 04:26:37 PM
Quote from: TheStranger on November 28, 2012, 03:06:47 PM
20 MPH advisory speed!
https://maps.google.com/maps?q=Bryant+%26+2nd,+San+Francisco&hl=en&ll=37.784765,-122.392827&spn=0.000809,0.001188&sll=37.78463,-122.391955&sspn=0.003252,0.004753&t=h&hnear=Bryant+St+%26+2nd+St,+San+Francisco,+California+94107&z=20&layer=c&cbll=37.784765,-122.392827&panoid=utSATZktBDrj6whW9AQJ6w&cbp=12,216.26,,0,4.06
I can beat that...
15 MPH advisory speed!
http://goo.gl/maps/j8ifv
Here:
http://goo.gl/maps/EbUj8
Sorry, the one I posted earlier has even those beat. http://goo.gl/maps/DMsxu
Quote15 MPH
Wichita has one on a highway (http://goo.gl/maps/8JR4R) that sometimes carry trucks with three trailers.
One of my favorites (http://goo.gl/maps/f5UuH) is in St Joseph, MO.
There used to be a very tight cloverleaf on MN-280 @ E Hennepin / Larpenteur. Can't recall if it was signed for 10 or 15 MPH. It has been since converted to a diamond.
http://www.historicaerials.com/aerials.php?scale=1.21620670801354E-5&lat=44.9925171908712&lon=-93.2056890071378&year=2004
This has got to be one of the tightest loops at least to stay on a main-line interstate, and from the looks of the construction, it's going to be even tighter:
https://maps.google.com/?ll=35.125297,-90.066226&spn=0.001893,0.003484&t=h&z=19
I-55 in Memphis
Look at all y'all with your spacious fancy ramps!
http://goo.gl/maps/C9Z6z
In New York we got ramps so tight, they're invisible!
http://goo.gl/maps/UaJQa
Quote from: Mr. Matté on November 30, 2012, 08:50:33 AM
This has got to be one of the tightest loops at least to stay on a main-line interstate, and from the looks of the construction, it's going to be even tighter:
https://maps.google.com/?ll=35.125297,-90.066226&spn=0.001893,0.003484&t=h&z=19
I-55 in Memphis
Maybe temporarily, but they're fixing that interchange. Two lane ramps, no more loops for I-55, and other fixes. Check the website. (I forget the URL.)
Three winners from Burlington, WI - all posted for 10mph advisory speeds. This is on a recently-built highway, too:
http://goo.gl/maps/P0bgv
http://goo.gl/maps/Nb7Sb
http://goo.gl/maps/cnKkF
Granted, it's not an interstate or even technically a freeway, and these entrances and exits are basically RIRO arrangements.
Functionally, though, they are still basically parclos. OTOH, their low speed rating is not due to their radii so much as their intersection points–unless you measure the radius at the intersection point (as in a completely square corner yielding a radius of zero, and a slightly curved RIRO yielding a very small one).
I-35E northbound at Business US 287 in Waxahachie, Texas:
https://maps.google.com/maps?q=Waxahachie,+TX&hl=en&ll=32.409114,-96.871921&spn=0.00341,0.004334&sll=32.412719,-96.858644&sspn=0.054562,0.069351&oq=Waxa&t=h&hnear=Waxahachie,+Ellis,+Texas&z=18
https://maps.google.com/maps?q=Waxahachie,+TX&hl=en&ll=32.409956,-96.872509&spn=0.004823,0.004334&sll=32.412719,-96.858644&sspn=0.054562,0.069351&oq=Waxa&t=h&hnear=Waxahachie,+Ellis,+Texas&z=18&layer=c&cbll=32.409956,-96.872509&panoid=kYH0d8LEJFuHZIYgHO0kDw&cbp=12,66.85,,0,0
Quote from: deathtopumpkins on November 28, 2012, 10:04:52 AM
Watch and learn, rest of the country:
http://goo.gl/maps/ZT07B MA 128/1A
http://goo.gl/maps/WH14G MA 128/35 (note, reconstructed as a diamond, opened this summer)
http://goo.gl/maps/rDLC7 MA 128/Lowell St
http://goo.gl/maps/OpFPR US 1/Walnut St
http://goo.gl/maps/KrlFK US 1/Main St
http://goo.gl/maps/0qGzM US 1/Essex St
http://goo.gl/maps/O3nQX US1/Salem St (this one's a bit of a stretch)
http://goo.gl/maps/vl8cL Riverway/Jamaicaway/MA 9
http://goo.gl/maps/PWVE8 MA 9/Weston Rd
http://goo.gl/maps/7CBBU MA9/27
http://goo.gl/maps/Jo1Pn MA9/30/126 (this one's also a bit of a stretch)
http://goo.gl/maps/cxtZN MA9/85
http://goo.gl/maps/n10yq MA146/Elm St
http://goo.gl/maps/RN7DQ MA2/12
Add MA 107/114 (although the loop ramp from MA 107 North to MA 114 West was recently eliminated due to the erection of a new building (District Court Building (?))) and the US 1/PA 352 cloverleaf into the mix as well.
Prior to 1988, the MA 128/Lowell St. interchange used to have a tight loop ramp from the northbound 128 direction.
Quote from: empirestate on December 01, 2012, 12:56:25 AM
Look at all y'all with your spacious fancy ramps!
http://goo.gl/maps/C9Z6z
In New York we got ramps so tight, they're invisible!
http://goo.gl/maps/UaJQa
Again, I'll submit the CA 110 one -- it has a stop sign at the end of the ramp! http://goo.gl/maps/QXLWF
http://maps.google.com/maps?q=Toms+River,+NJ&hl=en&ll=39.963397,-74.206558&spn=0.00208,0.004672&sll=27.698638,-83.804601&sspn=9.834914,19.138184&oq=toms+&t=h&hnear=Toms+River,+Ocean,+New+Jersey&z=18
SB GSP & US 9 Exit 82 ramp is real tight in Toms River, NJ.
Of all the tight loop ramps in Massachusetts that deathtopumpkins listed, the ramp from US 1 north to Walnut Street north in Saugus, IMO, is by far the worst. You have to slow down almost to a complete stop (not easy to do on that section of US 1) before you enter the ramp.
There are extremely tight ramps to and from westbound NY 7 to/from NY 5 in Schenectady, NY.
Here's one that was forced inside of an already-tight urban diamond: https://maps.google.com/maps?ll=40.913209,-74.070913&spn=0.002019,0.00486&sll=37.6,-95.665&sspn=34.459634,79.628906&t=k&z=18
I was on this one yesterday. Behold the beauty that is the Surekill...
http://goo.gl/maps/XMTIS
WB I-96 to SB US-31 in Muskegon is a very tight pair of ramps that involves a very short section of Airline Rd (old US-16) to connect the two ramps.
This one might be hard to beat, and I believe is posted at 10 MPH advisory on PA 12 at River Road:
Map:
http://bit.ly/ZpBXgt
StreetView:
http://bit.ly/Yw5B2j
10mph advisory speed limit here too... but I don't find this ramp that tight...
https://maps.google.com/?ll=43.104923,-87.917544&spn=0.003085,0.005284&t=h&z=18
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F7X1lJ.jpg&hash=057e5308ddd8048a27eb9fe3fc053312ce0f6490)