Favorite Stack Interchanges (Updated)

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CarGuru > Driving > Favorite Stack Interchanges (Updated) 1 April 2005 20:08:44

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Favorite Stack Interchanges (Updated)
LBracey 30 March 2005 05:06:02
	This is an update of a list that I wrote a few years ago. I've been to more places, which will reflect on this list as well. This list mainly highlights the West, given that there are more stacks out there, but there are some great examples in the East that I will highlight as well. Agree? Disagree? Any that you want to add? Let me know... 10) I-310/US 61 Kenner, LA It's an L.A. style interchange in the middle of the swamps of LA. Driving on top of the stack commands some great views of Suburban Kenner and the New Orleans skyline in the distance. http://southeastroads.com/louisiana050/us-061_sb_at_i-310_stack_03.jpg http://southeastroads.com/louisiana050/us-061_sb_at_i-310_stack_02.jpg 9) Spaghetti Junction (I-85/I-285) Atlanta, GA This is more of a sentimental favorite of mine. Compared to some of the West Coast Giants, this is a pretty diminutive stack, but it certainly is impressive. Very symmetrical and intelligent, well thought out connections to neighboring streets-Chamblee-Tucker Rd, Pleasantdale Rd, Northcrest Rd, and Buford Highway are all within close proximity. Just don't get stuck on top of the ramps during an ice storm! http://www.southeastroads.com/georgia050/i-085_nb_exit_096_01.jpg http://www.southeastroads.com/georgia050/i-085_nb_exit_096_02.jpg http://www.southeastroads.com/georgia050/i-085_nb_exit_096_03.jpg http://ist-socrates.berkeley.edu/~groch/Roads/fwi.htm 8) I-65/I-459 Birmingham/Hoover, AL I hate the faded green trusses because they really age this structure, but it's a stunning stack in a beautiful setting. Birmingham is on the tail-end of the Appalachian Mountains, and I-459 straddles a ridge, while I-65 cuts through the foothills. Some of the transition ramps are underneath I-65, while some of them are above both of the freeways. http://www.southeastroads.com/alabama200/i459_sb_exit_015_stack.jpg http://www.southeastroads.com/alabama200/i-459_sb_exit_015_04.jpg 7) CA-210/I-15 Rancho Cucamonga, CA When I visited So Cal back in 2003, this ramps was just a few weeks from being completed, but it already seems to be an impressive stack as well. Lots of concrete, and serpentine transitional ramps make this a very scenic stack as well. http://www.westcoastroads.com/california/images201/ca-210_eb_at_transition_to_i-15_1666.jpg http://www.westcoastroads.com/california/images201/ca-210_transition_from_i-15_sb_1627.jpg http://www.westcoastroads.com/california/images015/i-015_nb_exit_115_03.jpg 6) Dallas High Five (I-635/US 75) Dallas, TX This stack isn't quite finished yet, but nevertheless, it is still awe-inspiring. Unlike the older utilitarian Texan Stacks, this one actually has a lot of decorative elements, such as the Lone Star logo, and the piers are painted as well. Not to mention the ramps look pretty darn high as well. http://www.urbantransport-technology.com/projects/dallas_1/dallas_15.html http://www.texasfreeway.com/Dallas/construction/high_five/high_five_2004-06-23.html http://tti.tamu.edu/researcher/v40n2/images/high5_2004.jpg http://www.houstonfreeways.com/modern/2004-12_dfw_update.aspx http://dallashighfive.org/ 5) CA-91/I-5 Anaheim, CA This stack was redone when I-5 was re-widened through Orange County. Unlike most stacks in California, this one has huge floodlights above the stack, which light up for miles. Nice use of the sound walls, as well as using the old left exits as carpool lane ramps (That West-Coast terminology for HOV lanes BTW). Grrr...no connection from NB 5 to EB 91 though... http://www.westcoastroads.com/california/images005/i-005_sb_exit_114b_01.jpg http://www.westcoastroads.com/california/images005/i-005_sb_exit_114a_01.jpg http://www.westcoastroads.com/california/images005/i-005_nb_exit_113c_01.jpg http://www.westcoastroads.com/california/images005/i-005_nb_exit_115_04.jpg http://www.westcoastroads.com/california/images005/i-005_nb_exit_115_02.jpg 4) Sam Houston Tollway Stacks Houston, TX Everything is bigger in TEXAS, and the series of stacks along the SHT that surrounds Houston is a showcase of huge stacks. The most impressive one is the intersection with US-290. Lots of HUGE ramps. The interchange with the North Freeway (I-45) in North Houston adds some neon lighting in the overhead ramps, which add a nice touch. The interchange with the Katy Freeway (I-10) gets points for utilizing such limited space (this stack will be gone soon due to the reconstruction of the Katy Freeway though). The Stack with the Gulf Freeway is equally impressive. A perfect stack, symmetrical with ramps seemingly as high as the eye can see. http://www.texasfreeway.com/Houston/photos/bw8/bw8.shtml http://www.texasfreeway.com/Houston/photos/bw8/bw8_290.shtml http://www.texasfreeway.com/Houston/photos/bw8/bw8_i10w.shtml http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45n.shtml http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45s.shtml http://www.houstonfreeways.com/modern/2004-10-20_i10_at_bw8.aspx 3) I-595 Stacks Broward County, FL As you drive on the Alligator Alley (I-75) from Florida's West Coast, the insanity and urbanity of South Florida hits you all of a sudden. The stack where I-75/I-595 and FL-869 menacingly looms above you. The flatness of So Flo really adds to this effect. I-75 continues south to Hialeah, and the crowded I-595 takes you to Ft. Lauderdale to some other impressive stacks. Every time I look at these stacks, I think about the wasted potential of the I-4/I-75 interchange up here in Tampa Bay, which could've been SO much better. But given the total crap-assity of all the freeways here in Tampa Bay, I wasn't surprised. Anyway, next, you hit the mega-interchange with the Florida's Turnpike/FL-84. It's a combined stack and trumpet interchange that gets my roadgeek juices flowing every time I see it. Last, and definitely not least is the mega interchange that combines 595/95/FL-84/Broward Blvd/Tri-Rail Station/and a Partridge in pear tree. It's huge. I-95 incorporates a C/D system with I-595 that goes below street level before the ramps rise to some pretty high stacks. The bridges are also Multi-Colored-yellow, blue, red, and green. A nice finish before this freeway ends at US-1. Pictures: http://www.southeastroads.com/florida050/i-075_nb_exit_019_07.jpg http://www.southeastroads.com/florida050/i-075_nb_exit_019_08.jpg http://www.southeastroads.com/florida050/i-075_nb_exit_019_09.jpg http://www.southeastroads.com/florida500/i-595_eb_exit_008a_03.jpg http://www.southeastroads.com/florida500/i-595_eb_exit_009_01.jpg http://www.southeastroads.com/florida500/i-595_eb_exit_010a_05.jpg http://www.southeastroads.com/florida500/i-595_eb_exit_010b_02.jpg http://www.southeastroads.com/florida500/i-595_eb_exit_008b_01.jpg Diagrams: www.southfloridaroads.com/595_dia.html www.southfloridaroads.com/Interchange/Inserts/75_595.gif www.southfloridaroads.com/Interchange/Inserts/95_595_84.gif 2) I-105/1-110 Los Angeles, CA As a little kid in So Cal, I witnessed this huge interchange appear before my eyes during the late 80's/early 90's. It actually won a design award from the FHWA. Lots and lots of bridges, a METRO Green Line Station on I-110, huge Carpool Lane transition ramps, and a little Cloverleaf ramp from 110N to 105W. http://www.westcoastroads.com/california/images101/i-110_nb_exit_014_03t.jpg http://www.westcoastroads.com/california/images101/i-110_nb_exit_014_02t.jpg http://www.fhwa.dot.gov/eihd/i105i110.htm http://members.cox.net/mkpl/interchange/interchange.html And... STILL... #1 in my heart is.... 1) I-8/I-805 San Diego, CA I've been to many places around the country, and this one still stands the test of time. Completed in 1974, I-805 sweeps over the Mission Valley, connecting Kearny Mesa with North Park/Normal Heights. The ramps connecting to I-8 snake below the I-805 bridge, and actually sweeps above office buildings and condos on its way down to I-8. Sweeping views of Qualcomm Stadium, and the homes of Talmadge and Kensington neighborhoods clinging to the hillsides. There are even some decorative walls high above this interchange with motifs of sailboats. (I think they are in the SE quadrant of this interchange.) When I was a little kid, I was always scared that I was going to fall off the I-805 bridge, and driving on this ramp a few years back, that exciting feeling came back to me. If you have the opportunity to drive on this bridge, take it. It's worth every mile. http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_02.jpg http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_03.jpg http://www.westcoastroads.com/california/images008/i-008_eb_exit_006b_01.jpg http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_03.jpg http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_02.jpg http://members.cox.net/mkpl/interchange/sdint.html (Scroll Down toward the middle of the page) Honorable Mentions: I-110/US-61 Baton Rouge, LA Surprisingly tall stack in the heart of the ghettos of BR. http://southeastroads.com/louisiana050/us-061_sb_190_eb_app_la-0067.jpg http://southeastroads.com/louisiana050/us-061_sb_190_eb_at_la-0067.jpg I-440/I-65 Nashville, TN Similar looking to the Four-Level Interchange in LA, believe it or not. I-459/I-20 Birmingham, AL The Look-Alike Stacks of IH 635- Dallas, TX Any suggestions?? Any International Suggestions? LB Clearwater, FL
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Magyar 30 March 2005 06:23:13 [ permanent link ]
	"LBracey" <lbrash@yahoo.com> wrote in message news:1112144761.961767.69030@l41g2000cwc.googlegroups.com...> Any suggestions?? Any International Suggestions?> Clearwater, FL I think there are only 4 stacks within Ohio's boundaries. I-75-US 35 (Dayton) I-71/I-90/I-490 (Cleveland) I-77/I-490/E 55th St. (Cleveland) I-77/I-480 (Cleveland) Of their quality (compared to the SoCal collection), I don't know. -- Sandor Gulyas Graduate Student - Louisiana St. University Dept. of Geography & Anthropology "Many people talking But a mighty few people know" -- Alick "Rice" Miller (aka Sunny Boy Williamson [II]) from Dissatisfied
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Paul D. DeRocco 30 March 2005 07:09:41 [ permanent link ]
	"LBracey" <lbrash@yahoo.com> wrote> This is an update of a list that I wrote a few years ago. I've been> to more places, which will reflect on this list as well. This list> mainly highlights the West, given that there are more stacks out there,> but there are some great examples in the East that I will highlight as> well. Agree? Disagree? Any that you want to add? Let me know... <snip> 1) I-8/I-805 San Diego, CA> I've been to many places around the country, and this one still> stands the test of time. Completed in 1974, I-805 sweeps over the> Mission Valley, connecting Kearny Mesa with North Park/Normal Heights.> The ramps connecting to I-8 snake below the I-805 bridge, and actually> sweeps above office buildings and condos on its way down to I-8.> Sweeping views of Qualcomm Stadium, and the homes of Talmadge and> Kensington neighborhoods clinging to the hillsides. There are even some> decorative walls high above this interchange with motifs of sailboats.> (I think they are in the SE quadrant of this interchange.) When I was a> little kid, I was always scared that I was going to fall off the I-805> bridge, and driving on this ramp a few years back, that exciting> feeling came back to me. If you have the opportunity to drive on this> bridge, take it. It's worth every mile. Yes, that's a very cool stack. It looks like I-805 is draped across the canyon, as though it was suspended from the two sides. I'd put my vote on the I-5/CA-14 interchange in Sylmar, CA. It's quite complicated (especially if you count the I-5/I-210 interchange is part of it, since the truck lanes extend between the two), but also quite beautiful, because of the way it's integrated into the hills. -- Ciao, Paul D. DeRocco Paul mailtoderocco@ix.netcom.com
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Texasfreeway 30 March 2005 16:50:49 [ permanent link ]
	If you like the stack at SHT & IH-10W now it will be even better when they finish the rebuild associated with IH10 expansion project. The connecting ramps will be replaced to allow for the addition width of IH10. If the artist sketches are accuracte with respect to the schematics then the spans will be most impressive. LBracey wrote:> 4) Sam Houston Tollway Stacks Houston, TX> Everything is bigger in TEXAS, and the series of stacks along the SHT> that surrounds Houston is a showcase of huge stacks. The most> impressive one is the intersection with US-290. Lots of HUGE ramps. interchange with the North Freeway (I-45) in North Houston adds some> neon lighting in the overhead ramps, which add a nice touch. The> interchange with the Katy Freeway (I-10) gets points for utilizing such> limited space (this stack will be gone soon due to the reconstruction> of the Katy Freeway though). The Stack with the Gulf Freeway is equally> impressive. A perfect stack, symmetrical with ramps seemingly as high> as the eye can see.> http://www.texasfreeway.com/Houston/photos/bw8/bw8.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_290.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i10w.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45n.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45s.shtml> http://www.houstonfreeways.com/modern/2004-10-20_i10_at_bw8.aspx>
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Wctollwayguru 31 March 2005 00:14:39 [ permanent link ]
	The I-5/I-90 interchange in Seattle, WA, is quite neat. Here, you literally have 3 levels of mainline traffic, plus a separate viaduct for the I-90 HOV express lanes. Along I-5 in either direction, all exits to I-90 are on the right, but if you drive on I-90 in either direction, the "left-turning" transition ramps to I-5 are on the left side of the roadway. Both of the connector ramps from e/b I-90 to I-5 have meters. No other transition ramp at this interchange are metered. Although this interchange looks fun to drive through, just don't get caught on I-90's lower deck when the next big earthquake hits the Seattle area. --------------------------------- Eric K. Lin elin [at] i-m151eklvfwy [dot] com
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Elmer 31 March 2005 05:05:08 [ permanent link ]
	LBracey wrote:> 3) I-595 Stacks Broward County, FL> As you drive on the Alligator Alley (I-75) from Florida's West Coast,> the insanity and urbanity of South Florida hits you all of a sudden. First is the 3-level half-stack interchange at US-27. This was the first interchange constructed for any of the I-75 and I-595 projects. Besides being beautifully symetrical with flyovers for S-E and N-W movements and cloverleafs for W-S and E-N movements, the height of the flyover ramps provides a spectacular panoramic view of the Everglades. It was also the first place in South Florida where box beam girders were used for the flyover ramps. For this interchange, they are made of steel. Box beam girder bridges built later in this period were often made of segmented concrete sections. When this interchange first opened, it connected US-27 with SR-84. I-75 and I-595 had yet to be built, however SR-84 had just been upgraded from two lanes to four lanes. The Westbound lanes used the previous two-lane ROW, but the Eastbound SR-84 lanes were relocated to the South. It is now the Eastbound frontage road of I-595. The distance between Westbound and Eastbound lanes seemed enormous at the time and there was a dense growth of trees between them. Slowly, over the years that followed, the trees were removed and site markers appeared where the bridges for I-595 were eventually built. The stack where I-75/I-595 and FL-869 menacingly looms above you. The> flatness of So Flo really adds to this effect. I-75 continues south Hialeah, and the crowded I-595 takes you to Ft. Lauderdale to some> other impressive stacks. This interchange (sometimes called the Bonaventure interchange) was constructed and opened in stages with temporary ramps. Initially, construction of the Sawgrass Expressway was not a certainty, and that is part of the reason why this interchange is not very symmetrical. The first movement to open was the I-75 mainline (Northbound-Westbound and Eastbound-Southbound) because, although it is a 90 degree turn, it involves no bridges. The first bridge to open (crossing over SR-84 Eastbound) allows Northbound traffic to exit Eastbound. It is the second segmented concrete bridge constructed in South Florida (the first being the flyover from Northbound Florida's Turnpike (HEFT) to Northbound I-75). This two lane bridge was also temporarilly used for Westbound-Southbound access until the second bridge, the high W-S flyover was opened. Through this period, Eastbound traffic from Alligator Alley needed to exit onto SR-84 just past US-27 because there were no exits off I-75 until Nova Drive, way past the Bonaventure interchange (although Westbound traffic on SR-84 had a temporary slip-ramp to access I-75 West). This situation changed when the Eastbound-Eastbound segmented bridge crossing over I-75 mainline opened. It's construction was delayed due to problems with the segmented technology. If you look closely at these three bridges, you can see evidence of special reinforcing at some sections where ugliness mars the otherwise clean lines. When I-595 first opened, the interchange was still in this configuration. About the same time, when the Sawgrass expressway first opened, it ended at Sunrise Boulevard. This was so useless that a public relations company created a frog character called "Cecil B. Sawgrass" to promote the road. Instead of being signed FL-869, a cute image of the frog peeking from behind a sawgrass plant was the shield that appeared on all signs. In some places there were HUGE pictures of the frog standing up begging drivers to (go out of their way AND pay to) take his expressway. Ultimately the Bonaventure ramps to the Sawgrass were built. These last four bridges were the longest and most complicated of the interchange. The two bridges providing Northbound-Northbound and Southbound-Southbound movements are each three lanes wide and were built with parallell rows of segmented sections. The Westbound-Northbound flyover is the highest and longest of the interchange. The excellent service these final connections provided made finally the Sawgrass practical and put poor Cecil the frog out of business. (Has anyone collected his old signs or are there images online?) Anyway, next, you hit the mega-interchange with the Florida's> Turnpike/FL-84. It's a combined stack and trumpet interchange that> gets my roadgeek juices flowing every time I see it. There was an alternate design for the Turnpike interchange to be a full, four-level stack. Conversion of the Turnpike South of Palm Beach county from toll ticket to coin operation was still being studied. Because that (no-brainer) decision was delayed, the trumpet design was used instead. A toll plaza was to have been built (in the obvious place) for all traffic going to and from the Turnpike. The stack design would have been much safer and more efficient than the weaves and huge loops of the trumpet. The adjacent US-441/SR-84 stack complex is excellent although, tragically, on the very first day it opened, a Florida Highway Patrol officer was killed when hit head-on by an elderly driver going the wrong way. The US-441 interchange was built of concrete segments and opened quite a bit before the Turnpike trumpet sections. Last, and definitely not least is the mega interchange that combines> 595/95/FL-84/Broward Blvd/Tri-Rail Station/and a Partridge in pear> tree. It's huge. I-95 incorporates a C/D system with I-595 that goes> below street level before the ramps rise to some pretty high stacks.> The bridges are also Multi-Colored-yellow, blue, red, and green. A nice> finish before this freeway ends at US-1. The flyovers of this interchange are of steel box beam construction rather than segmented concrete. It's profile had to be kept to a minimum due to it's close proximity to the airport. Although it functions like a four-level stack, the ramps were adjusted so they do not all cross in the center so it did not need to actually be four levels high. This interchange also opened in stages and had several temporary configurations. The SR-84 interchange with I-95 was temporarily closed during construction. Access was via what would eventually become I-595 via slip ramps from SW 26th Terrace. There were two temporary traffic signals on the I-595 mainline at temporary ramps to and from I-95. There were also temporary slip ramps to the frontage road on the North side of the airport. The "Ft. Lauderdale News" held a contest to name the interchange, but fortunately, the stupid sounding and technically incorrect "Lauder Loops" never caught on. The colors were selected by an artist who's name I don't remember. There was a "thing" where he chose colors for several projects around that time including the New River Tunnel in Ft. Lauderdale. I thought the tunnel was vivid and cheerful, but that the pastel interchange colors came out disappointingly dull. The design of the I-95/SR-84 portion of this interchange is also interesting. SR-84 crosses over I-95 on two bridges that are parallell, but on different levels. This allows traffic exiting I-95 from either direction to turn left without conflict. (Unfortunately, the geometry is too tight and large trucks sometimes have a problem turning.) I lived in Ft. Lauderdale from 1977 to 1996 and drove these corridors daily. I loved watching all of this being built and deighted in driving on every part the first day it opened (sometimes before). Elmer
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James W Anderson 1 April 2005 07:22:59 [ permanent link ]
	Utah has the 'Nest of Vipers' interchnage at I-15/I-80/U-201 in Salt Lake that has 18 movements, some new to the interchange after they connected I-80 to U-201, which was not possible before without some real effort, including getting off one freeway to get onto the other. Much of this is due to CD roads north of it being connected to from the various freeways and from the fact that U-201 runs west north of where I-80 comes into it. Quite a wild S-curve three lanes each way under the whole thing and then over the trainyards while going under some flyover ramps. All exits are right exits off any of the freeways. One braided ramp, at 800 West, an onramp, flies over the ramp off U-201 to 900 West. You use this one to get onto U-201 from 2100 South directly, you don't have to get on a block west if you don't want to, saves a turn through some heavy truck traffic as there are a fair number of warehouses and industrial locations nearby. It's still screwy, and loads of ramps, hence the name. There are also several surface roads going through underneath. Two train lines go through it, one is a future TRAX light rail line, and the other, on the very east edge of it, under the gore area for WB I-80 to NB I-15 or CD roads, is the N/S TRAX line. There are some trainyards under the west end of it also. It was just south of here where the tanker leaked last month, and that actually closed almost all of this monster down for many hours. Some nice touches include ponds of water that stay filled just about year-round. The aesthetics are not as good as the Phoenix stacks are, but the wild mix of ramps and movements make for a very interesting interchange. This was built between 1997-2001 when the I-15 freeway was widened from six to ten lanes, part of the Olympic preparations in Salt Lake. It took them four years to complete the entire project.
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Pat O'Connell 1 April 2005 08:37:05 [ permanent link ]
	LBracey wrote:> This is an update of a list that I wrote a few years ago. I've been> to more places, which will reflect on this list as well. This list> mainly highlights the West, given that there are more stacks out there,> but there are some great examples in the East that I will highlight as> well. Agree? Disagree? Any that you want to add? Let me know... ... STILL...> #1> in my heart is....> 1) I-8/I-805 San Diego, CA> I've been to many places around the country, and this one still> stands the test of time. Completed in 1974, I-805 sweeps over the> Mission Valley, connecting Kearny Mesa with North Park/Normal Heights.> The ramps connecting to I-8 snake below the I-805 bridge, and actually> sweeps above office buildings and condos on its way down to I-8.> Sweeping views of Qualcomm Stadium, and the homes of Talmadge and> Kensington neighborhoods clinging to the hillsides. There are even some> decorative walls high above this interchange with motifs of sailboats.> (I think they are in the SE quadrant of this interchange.) When I was a> little kid, I was always scared that I was going to fall off the I-805> bridge, and driving on this ramp a few years back, that exciting> feeling came back to me. If you have the opportunity to drive on this> bridge, take it. It's worth every mile.> http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_02.jpg> http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_03.jpg> http://www.westcoastroads.com/california/images008/i-008_eb_exit_006b_01.jpg> http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_03.jpg> http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_02.jpg This is the only one of all those stacks that I've been through. ...> Any suggestions?? Any International Suggestions?> The Big I in Albuquerque (I-25/I-40), which is well designed from both an engineering and aesthetic point of view. The stack at I-15 and I-215 in Las Vegas isn't as pretty, but was well designed (the I-15 and I-515/US 95 interchange is ugly and badly designed). I don't know if the Dan Ryan/Congress interchange in Chicago counts as a stack, but it's pretty amazing. -- Pat O'Connell [note munged EMail address] Take nothing but pictures, Leave nothing but footprints, Kill nothing but vandals...
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Thomas Smith 1 April 2005 10:01:18 [ permanent link ]
	The I-25/I-225 "full house" interchange in south Denver is going to be a good one when they finish it. In addition to the two freeways. the interchange will also be "braded" with I-25/Belleview and I-225/Tamarac/Yosemite. Don't forget that will have an RTD light rail junction in the interchange, too. The tracks will be in the median of I-225 and on the west side of I-25. It looks like the train tracks will be under I-25 mainline, but over the SB I-225 to SB I-25 ramp. It looks like the train tracks will be partially stacked, too. The southbound I-225 to northbound I-25 rail line looks like it will actually go over the southbound I-225 to southbound I-25 tracks. Another fun one is the I-25/I-70 "mousetrap". The original through lanes of I-70 now function as a C/D road system for the ramps to/from I-25. Also, the interchange is now braded with I-25/38th Ave./Fox St./Park Ave. W., I-70/Washington, and I-70/Pecos. -- I'm Tom Smith, and I approved this message.
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Argatlam Roads 1 April 2005 19:11:39 [ permanent link ]
	[Mr. O'Connell:] Any suggestions?? Any International Suggestions?> The Big I in Albuquerque (I-25/I-40), which is well designed from both> an engineering and aesthetic point of view. The "Big I" is not a stack. I used to think it was, but it turns out that the ramps from I-40 eastbound to I-25 northbound and from I-40 westbound to I-25 southbound wrap around each other at the center of the interchange in a "turban" configuration. This means that the "Big I" is neither a four-level stack, nor a two-level turban, but instead a three-level stack/turban hybrid. I agree the "Big I" has an attractive aesthetic treatment but I dislike one aspect of its design. The ramps in the southeast quadrant of the interchange are configured so that the ramp from I-25 N.B. to I-40 E.B. has to tuck down under the ramp from I-25 S.B. to I-40 E.B. This allows the latter ramp to have a curve of higher radius (and thus a higher design speed) since it does not have to accomplish a 90В° change of bearing within as short a distance as it would have if it were to merge with the other ramp just before the University Blvd. overcrossing. However, the N.B.-to-E.B. ramp has a sharp and essentially blind summit curve (to leave enough clearance under the S.B.-to-E.B. ramp) followed in short order by a sharp curve to the right, which isn't very good coordination of horizontal and vertical alignment. A very superficial idea of the arrangement of the ramps can be obtained from this key plan: http://winklers-roads.fotopic.net/p13323830.html I don't know if the Dan Ryan/Congress interchange in Chicago counts as a> stack, but it's pretty amazing. In fact, it is a turban interchange. Cf. http://terraserver.homeadvisor.msn.com/image.aspx?T=1&S=10&Z=16&X=2232&Y=23180&W=1
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C M Martin 1 April 2005 19:29:31 [ permanent link ]
	LBracey wrote:> This is an update of a list that I wrote a few years ago. I've been> to more places, which will reflect on this list as well. This list> mainly highlights the West, given that there are more stacks out there,> but there are some great examples in the East that I will highlight well. Agree? Disagree? Any that you want to add? Let me know...> 10) I-310/US 61 Kenner, LA> It's an L.A. style interchange in the middle of the swamps of LA.> Driving on top of the stack commands some great views of Suburban> Kenner and the New Orleans skyline in the distance.> http://southeastroads.com/louisiana050/us-061_sb_at_i-310_stack_03.jpg> http://southeastroads.com/louisiana050/us-061_sb_at_i-310_stack_02.jpg> 9) Spaghetti Junction (I-85/I-285) Atlanta, GA> This is more of a sentimental favorite of mine. Compared to some of West Coast Giants, this is a pretty diminutive stack, but it certainly> is impressive. Very symmetrical and intelligent, well thought out> connections to neighboring streets-Chamblee-Tucker Rd, Pleasantdale Rd,> Northcrest Rd, and Buford Highway are all within close proximity. Just> don't get stuck on top of the ramps during an ice storm!> http://www.southeastroads.com/georgia050/i-085_nb_exit_096_01.jpg> http://www.southeastroads.com/georgia050/i-085_nb_exit_096_02.jpg> http://www.southeastroads.com/georgia050/i-085_nb_exit_096_03.jpg> http://ist-socrates.berkeley.edu/~groch/Roads/fwi.htm> 8) I-65/I-459 Birmingham/Hoover, AL> I hate the faded green trusses because they really age this structure,> but it's a stunning stack in a beautiful setting. Birmingham is on> the tail-end of the Appalachian Mountains, and I-459 straddles a ridge,> while I-65 cuts through the foothills. Some of the transition ramps underneath I-65, while some of them are above both of the freeways.> http://www.southeastroads.com/alabama200/i459_sb_exit_015_stack.jpg> http://www.southeastroads.com/alabama200/i-459_sb_exit_015_04.jpg> 7) CA-210/I-15 Rancho Cucamonga, CA> When I visited So Cal back in 2003, this ramps was just a few weeks> from being completed, but it already seems to be an impressive stack well. Lots of concrete, and serpentine transitional ramps make this a> very scenic stack as well.> http://www.westcoastroads.com/california/images201/ca-210_eb_at_transition_to_i-15_1666.jpg> http://www.westcoastroads.com/california/images201/ca-210_transition_from_i-15_sb_1627.jpg> http://www.westcoastroads.com/california/images015/i-015_nb_exit_115_03.jpg> 6) Dallas High Five (I-635/US 75) Dallas, TX> This stack isn't quite finished yet, but nevertheless, it is still> awe-inspiring. Unlike the older utilitarian Texan Stacks, this one> actually has a lot of decorative elements, such as the Lone Star logo,> and the piers are painted as well. Not to mention the ramps look pretty> darn high as well.> http://www.urbantransport-technology.com/projects/dallas_1/dallas_15.html> http://www.texasfreeway.com/Dallas/construction/high_five/high_five_2004-06-23.html> http://tti.tamu.edu/researcher/v40n2/images/high5_2004.jpg> http://www.houstonfreeways.com/modern/2004-12_dfw_update.aspx> http://dallashighfive.org/> 5) CA-91/I-5 Anaheim, CA> This stack was redone when I-5 was re-widened through Orange County.> Unlike most stacks in California, this one has huge floodlights above> the stack, which light up for miles. Nice use of the sound walls, as> well as using the old left exits as carpool lane ramps (That West-Coast> terminology for HOV lanes BTW). Grrr...no connection from NB 5 to EB though...> http://www.westcoastroads.com/california/images005/i-005_sb_exit_114b_01.jpg> http://www.westcoastroads.com/california/images005/i-005_sb_exit_114a_01.jpg> http://www.westcoastroads.com/california/images005/i-005_nb_exit_113c_01.jpg> http://www.westcoastroads.com/california/images005/i-005_nb_exit_115_04.jpg> http://www.westcoastroads.com/california/images005/i-005_nb_exit_115_02.jpg> 4) Sam Houston Tollway Stacks Houston, TX> Everything is bigger in TEXAS, and the series of stacks along the SHT> that surrounds Houston is a showcase of huge stacks. The most> impressive one is the intersection with US-290. Lots of HUGE ramps. interchange with the North Freeway (I-45) in North Houston adds some> neon lighting in the overhead ramps, which add a nice touch. The> interchange with the Katy Freeway (I-10) gets points for utilizing such> limited space (this stack will be gone soon due to the reconstruction> of the Katy Freeway though). The Stack with the Gulf Freeway is equally> impressive. A perfect stack, symmetrical with ramps seemingly as high> as the eye can see.> http://www.texasfreeway.com/Houston/photos/bw8/bw8.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_290.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i10w.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45n.shtml> http://www.texasfreeway.com/Houston/photos/bw8/bw8_i45s.shtml> http://www.houstonfreeways.com/modern/2004-10-20_i10_at_bw8.aspx> 3) I-595 Stacks Broward County, FL> As you drive on the Alligator Alley (I-75) from Florida's West Coast,> the insanity and urbanity of South Florida hits you all of a sudden.> The stack where I-75/I-595 and FL-869 menacingly looms above you. The> flatness of So Flo really adds to this effect. I-75 continues south Hialeah, and the crowded I-595 takes you to Ft. Lauderdale to some> other impressive stacks. Every time I look at these stacks, I think> about the wasted potential of the I-4/I-75 interchange up here in Tampa> Bay, which could've been SO much better. But given the total> crap-assity of all the freeways here in Tampa Bay, I wasn't> surprised.> Anyway, next, you hit the mega-interchange with the Florida's> Turnpike/FL-84. It's a combined stack and trumpet interchange that> gets my roadgeek juices flowing every time I see it.> Last, and definitely not least is the mega interchange that combines> 595/95/FL-84/Broward Blvd/Tri-Rail Station/and a Partridge in pear> tree. It's huge. I-95 incorporates a C/D system with I-595 that goes> below street level before the ramps rise to some pretty high stacks.> The bridges are also Multi-Colored-yellow, blue, red, and green. A nice> finish before this freeway ends at US-1.> Pictures:> http://www.southeastroads.com/florida050/i-075_nb_exit_019_07.jpg> http://www.southeastroads.com/florida050/i-075_nb_exit_019_08.jpg> http://www.southeastroads.com/florida050/i-075_nb_exit_019_09.jpg> http://www.southeastroads.com/florida500/i-595_eb_exit_008a_03.jpg> http://www.southeastroads.com/florida500/i-595_eb_exit_009_01.jpg> http://www.southeastroads.com/florida500/i-595_eb_exit_010a_05.jpg> http://www.southeastroads.com/florida500/i-595_eb_exit_010b_02.jpg> http://www.southeastroads.com/florida500/i-595_eb_exit_008b_01.jpg> Diagrams:> www.southfloridaroads.com/595_dia.html> www.southfloridaroads.com/Interchange/Inserts/75_595.gif> www.southfloridaroads.com/Interchange/Inserts/95_595_84.gif> 2) I-105/1-110 Los Angeles, CA> As a little kid in So Cal, I witnessed this huge interchange appear> before my eyes during the late 80's/early 90's. It actually won a> design award from the FHWA. Lots and lots of bridges, a METRO Green> Line Station on I-110, huge Carpool Lane transition ramps, and a little> Cloverleaf ramp from 110N to 105W.> http://www.westcoastroads.com/california/images101/i-110_nb_exit_014_03t.jpg> http://www.westcoastroads.com/california/images101/i-110_nb_exit_014_02t.jpg> http://www.fhwa.dot.gov/eihd/i105i110.htm> http://members.cox.net/mkpl/interchange/interchange.html> And...> STILL...> #1> in my heart is....> 1) I-8/I-805 San Diego, CA> I've been to many places around the country, and this one still> stands the test of time. Completed in 1974, I-805 sweeps over the> Mission Valley, connecting Kearny Mesa with North Park/Normal Heights.> The ramps connecting to I-8 snake below the I-805 bridge, and actually> sweeps above office buildings and condos on its way down to I-8.> Sweeping views of Qualcomm Stadium, and the homes of Talmadge and> Kensington neighborhoods clinging to the hillsides. There are even some> decorative walls high above this interchange with motifs of sailboats.> (I think they are in the SE quadrant of this interchange.) When I was little kid, I was always scared that I was going to fall off the I-805> bridge, and driving on this ramp a few years back, that exciting> feeling came back to me. If you have the opportunity to drive on this> bridge, take it. It's worth every mile.> http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_02.jpg> http://www.westcoastroads.com/california/images008/i-008_eb_exit_007_03.jpg> http://www.westcoastroads.com/california/images008/i-008_eb_exit_006b_01.jpg> http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_03.jpg> http://www.westcoastroads.com/california/images801/i-805_nb_exit_017_02.jpg> http://members.cox.net/mkpl/interchange/sdint.html> (Scroll Down toward the middle of the page)> Honorable Mentions:> I-110/US-61 Baton Rouge, LA> Surprisingly tall stack in the heart of the ghettos of BR.> http://southeastroads.com/louisiana050/us-061_sb_190_eb_app_la-0067.jpg> http://southeastroads.com/louisiana050/us-061_sb_190_eb_at_la-0067.jpg> I-440/I-65 Nashville, TN> Similar looking to the Four-Level Interchange in LA, believe it or not.> I-459/I-20 Birmingham, AL> The Look-Alike Stacks of IH 635- Dallas, TX> Any suggestions?? Any International Suggestions?> Clearwater, FL I have always loved Spaghetti Junction (I-85/285) in northeast Atlanta. I have heard that the top of the stack -- 285 wb onto 85 sb -- is the highest point in the metro area, and it provides a great view of the Atlanta skyline. The problem with Spaghetti Junction is 285 eb to 85 nb, one of the worst bottlenecks in the country. Two lanes just don't get the job done! C M Martin
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Argatlam Roads 1 April 2005 19:30:25 [ permanent link ]
	[Mr. Bracey:] Any suggestions?? Any International Suggestions? In general I like four-level stacks which are located in hilly terrain, ideally partly on sidelong ground which allows the ramps to make graceful transitions between different levels by means of very long, constant-radius curves which begin almost at the diverge gore and end almost at the merge gore. I dislike stacks where the left-turning flyover ramps curve abruptly in midair. Stacks with attractive ramp layouts include the original Four Level (U.S. 101/Calif. 110) in downtown Los Angeles and the I-90/I-405 stack interchange near Bellevue, Wash. An example of a "bad" stack with ramps starting curves in midair is I-580/I-980/Calif. 24 in Oakland. To be fair, however, a B.A.R.T. line (running generally in the median of I-980/Calif. 24) also has to be worked around. In international terms, Great Britain has three stacks on the motorway network--M4/M5 (Almondsbury, near Bristol), M4/M25 (near Heathrow Airport) and M25/M23 (at Merstham, en route to Gatwick Airport). The Almondsbury interchange, opened in September 1966, was Britain's first stack. The Merstham interchange opened in 1974 and is grossly overscaled for the traffic it carries because the proposed M23 north of Hooley, which would have connected the existing M23 with the so-called "Ringway 2" of the planned London motorway network, was cancelled in the early 1980's. http://www.iht.org/motorway/m4lswscheme.htm#s2 http://www.iht.org/motorway/m23londpeas.htm
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Bill Grunnah 1 April 2005 20:08:44 [ permanent link ]
	<argatlam_roads@yahoo.com.mx> wrote in message news:1112369425.420468.268280@o13g2000cwo.googlegroups.com...> [Mr. Bracey:]> Any suggestions?? Any International Suggestions?> In general I like four-level stacks which are located in hilly terrain,> ideally partly on sidelong ground which allows the ramps to make> graceful transitions between different levels by means of very long,> constant-radius curves which begin almost at the diverge gore and end> almost at the merge gore. I dislike stacks where the left-turning> flyover ramps curve abruptly in midair.> Here's a 3-level you should like -- I-20 at Spur 408 in southwest Dallas: http://terraserver.microsoft.com/image.aspx?T=4&S=12&Z=14&X=865&Y=4520&W=1 (yes, part of the image is screwed up) It's particularly unusual because Dallas is generally flat as a pancake, but this area is hilly enough that eastbound I-20 has the only climbing lane that I know of for hundreds of miles. - B
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CarGuru > Driving > Favorite Stack Interchanges (Updated) 1 April 2005 20:08:44

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Favorite Stack Interchanges (Updated)

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