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Bridges on Bridges

Started by PAHighways, May 24, 2011, 02:10:42 PM

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DeaconG

Quote from: roadman65 on February 11, 2012, 06:44:02 PM
Quote from: MrDisco99 on February 10, 2012, 07:04:45 PM

Quote from: roadman65 on May 28, 2011, 09:31:57 AM
174th and 175th Streets under Grand Councourse in the Bronx has a large arched bridge in both locations with the subway dropping from the ceiling in the middle.

Wow, I just pulled that up on StreetView... I never knew that was there.  I guess I never thought about how deep the subway would have to be there.

You have the Connecticut Avenue Line of the Washington Metro where it has to go real deep cause Connecticut Avenue is way over 100 feet above Rock Creek Park and Parkway.  The tunnels are beneath the river and roadway beneath the high bridge.  Nonetheless, it explains why the Cross Bronx tunnels under the Grand Concourse instead of a normal bridge over the highway.

It would also explain SEPTA's Broad Street Line under Broad Street where it crosses over the Roosevelt Expressway.  I always had a suspicion that was the case from way back as a kid-why did they have a viaduct like that?

http://g.co/maps/jc52u
Dawnstar: "You're an ape! And you can talk!"
King Solovar: "And you're a human with wings! Reality holds surprises for everyone!"
-Crisis On Infinite Earths #2


empirestate

Quote from: roadman65 on May 28, 2011, 09:31:57 AM
174th and 175th Streets under Grand Councourse in the Bronx has a large arched bridge in both locations with the subway dropping from the ceiling in the middle.

Then you also have Mosholu Parkway under Jerome Avenue under the #4 elevated line:
http://g.co/maps/jukev

D-Dey65

Part of the Third Avenue El used to run on the Gun Hill Road bridge over the New York Central Harlem-New Haven Lines at Williams Bridge Station(Not my link, so I'm not showing it):
http://world.nycsubway.org/perl/show?40835


D-Dey65

Quote from: DeaconG on March 19, 2012, 01:51:05 AM
It would also explain SEPTA's Broad Street Line under Broad Street where it crosses over the Roosevelt Expressway.  I always had a suspicion that was the case from way back as a kid-why did they have a viaduct like that?

http://g.co/maps/jc52u
Crap! If it wasn't so close to Hunting Park and Wyoming Stations, I'd say they should reroute the Broad Street Line under the Roosevelt Expressway!


NoGoodNamesAvailable

Quote from: Mr_Northside on February 08, 2012, 04:24:22 PM
http://maps.google.com/maps?q=15212&hl=en&ll=40.428688,-79.930344&spn=0.020613,0.045447&sll=37.0625,-95.677068&sspn=43.713406,93.076172&hnear=Pittsburgh,+Pennsylvania+15212&t=h&z=15&layer=c&cbll=40.428696,-79.938671&panoid=jYzdDqxlwAMHjEiz_hpdRQ&cbp=12,106.5,,0,-1.44

The infamous "catch" bridge under the Greenfield bridge along the Parkway East.
In a couple of years this should be a thing of the past, since they're finally going to rebuild the Greenfield Bridge.

Off-topic, but there's a rectangular "Beware of Aggressive Drivers" sign just after the bridge (in positive-contrast Clearview, no less!)

Alex4897

👉😎👉

cpzilliacus

Opinions expressed here on AAROADS are strictly personal and mine alone, and do not reflect policies or positions of MWCOG, NCRTPB or their member federal, state, county and municipal governments or any other agency.

Pete from Boston

Is the topic "double-decked bridges," "two integral bridges, one over the other," or "one bridge that crosses over another bridge"?


cpzilliacus

Quote from: Pete from Boston on December 26, 2014, 09:53:34 AM
Is the topic "double-decked bridges," "two integral bridges, one over the other," or "one bridge that crosses over another bridge"?

Yes!
Opinions expressed here on AAROADS are strictly personal and mine alone, and do not reflect policies or positions of MWCOG, NCRTPB or their member federal, state, county and municipal governments or any other agency.

Pete from Boston

BU Bridge over Grand Junction railroad bridge, Boston.

There used to be an el over the roadway on the North Washington St. bridge in Boston, but now there's just a hole in its heart truss where the el used to be.

TheHighwayMan3561

self-certified as the dumbest person on this board for 5 years running

empirestate

Are there any cases where two roadways (or railways) cross using a conventional bridge-type structure while both are inside of a tunnel or cavern-like area?

Pete from Boston

The title of this thread reads like it's a TV show hosted by Todd Bridges about, well, bridges.

cl94

US 20 west of Albany, NY has this thing, where 2 tracks of a double track railroad line swap sides directly above the highway
Please note: All posts represent my personal opinions and do not represent those of my employer or any of its partner agencies.

Travel Mapping (updated weekly)

Bickendan

Steele Bridge (old US/OR 99W) -- double decked lift bridge.
Heavy rail + bicycle/pedestrian span on bottom deck, lifts independently from the top deck.
Cars + light rail and sidewalks on top deck.

Tom958

The coolest one I know of is on the D1, the most important motorway in the Czech Republic. The Nazis had started building an autobahn there, then gave up during the war, but a bridge over a watercourse was completed and used for a local road. Decades later, the Communists decided to complete the motorway, but to higher standards including less-steep grades. The lay of the land was such that it made more sense to build the new motorway directly over the old one than to tear down the existing bridge.

I saw it at skyscrapercity years ago, but I'm too lazy to look for it now since the Czech roads thread has gotten really long. It was hard to see on Google, too, even when I found out exactly where to look. Maybe ChrisZwolle will see this and help out.  :wave:

Pete from Boston

The Sarah Mildred Long Bridge (not really that long) over the Piscataqua River between Portsmouth, N.H., and Kittery, Me., has a rail line beneath that has been a sticking point in the bridge's replacement due to its strategic importance in carrying nuclear materials (either fuel or waste) to or from the Portsmouth Naval Shipyard on the Maine side.

roadman65

Near Annapolis, MD there is the ramp from SB MD 2 to EB US 50 and WB MD 450 that is built on top of US 50 bridge over MD 2 NB.  It has a pier that rests on the bridge itself where the girders for the US 50 bridge actually support the flyover above it.
https://www.google.com/maps/@39.0139009,-76.490847,3a,75y,95.25t/data=!3m4!1e1!3m2!1sH5Rj-BTsezyG_ZcVmPgzYA!2e0
https://www.google.com/maps/place/Annapolis,+MD/@39.0144504,-76.4904551,3a,75y,270h,90t/data=!3m4!1e1!3m2!1s_tEV_bF7kkeMJ_f-5spiJw!2e0!4m2!3m1!1s0x89b7f66570672fd5:0x43f854fdd3a8274b
Every day is a winding road, you just got to get used to it.

Sheryl Crowe

Pete from Boston

Montague City Covered Bridge, Mass., over Connecticut River: railroad on top, road below. 

Dislodged from piers in 1936 flood and floated away, taking out the next two bridges downstream.


Bruce

The Lakeview Boulevard overpass on I-5 goes right over a double-decked viaduct carrying southbound I-5 and the reversible express lanes, which in turn are crossing over offramps to Mercer Street.


Lakeview Boulevard overpass from Eastlake Avenue by SounderBruce, on Flickr

Beltway

Quote from: roadman65 on February 11, 2012, 06:44:02 PM
You have the Connecticut Avenue Line of the Washington Metro where it has to go real deep cause Connecticut Avenue is way over 100 feet above Rock Creek Park and Parkway.  The tunnels are beneath the river and roadway beneath the high bridge.  Nonetheless, it explains why the Cross Bronx tunnels under the Grand Concourse instead of a normal bridge over the highway.

The Metrorail tunnels pass under the bottom of the ravine and under Rock Creek.  That means the approach tunnels have to run deeper and deeper under Connecticut Avenue as they approach the deepest point below Rock Creek.

WMATA originally planned a shallower design that would have had portals and a bridge about 30 feet above the creek.  Complaints about aesthetics caused the design to be changed to a line that passes completely under the creek.

https://ggwash.org/view/42481/the-red-line-could-have-had-amazing-views-over-rock-creek

http://ghostsofdc.org/2013/10/01/never-built-metros-bridge-rock-creek/
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

D-Dey65

Two bridges of the IRT Pelham Line over Westchester Avenue over two different parkways;

Bronx River Parkway:
https://commons.wikimedia.org/wiki/File:IRT_Pelham_Line_over_Bronx_River_Pkwy.jpg


Hutchinson River Parkway:
https://commons.wikimedia.org/wiki/File:Hutch_Pkwy_under_the_IRT_Pelham_Line.jpg


Meanwhile, here's the IRT Jerome Avenue Line, and the street it was named for over the Cross Bronx Expressway:
https://commons.wikimedia.org/wiki/File:Mount_Eden_Av_from_CBX_vc.jpg


And Astoria Boulevard station on the BMT Astoria Line over the Grand Central Parkway:
https://commons.wikimedia.org/wiki/File:GCP_Astoria_Blvd_31st_St_BMT_jeh.JPG




sparker

There are two road-over-rail bridges (both through-truss types, with the rail between the trusses and the roadway sitting atop those trusses) in the CA state system; one is on CA 70 NE of Oroville across a branch of Lake Oroville; built in 1962 as part of the realignment project on that highway (then Alternate US 40) when the Oroville Dam was built, the UP (formerly WP) Feather River line is on the lower deck, and 4 lanes of CA 70 are on top.  The other is the Pit River Bridge, with the main CA-OR line of UP (formerly SP) through the trusses and I-5 on top -- 4 lanes with a K-rail separation.  The roadway originally carried 4 lanes of US 99 traffic with just a double-line down the middle; the roadway was extended circa 1974 via cantilevered side sections to allow 12-foot lanes plus the median.   

mapman1071

Quote from: D-Dey65 on October 04, 2017, 03:10:36 PM
Two bridges of the IRT Pelham Line over Westchester Avenue over two different parkways;

Bronx River Parkway:
https://commons.wikimedia.org/wiki/File:IRT_Pelham_Line_over_Bronx_River_Pkwy.jpg


Hutchinson River Parkway:
https://commons.wikimedia.org/wiki/File:Hutch_Pkwy_under_the_IRT_Pelham_Line.jpg


Meanwhile, here's the IRT Jerome Avenue Line, and the street it was named for over the Cross Bronx Expressway:
https://commons.wikimedia.org/wiki/File:Mount_Eden_Av_from_CBX_vc.jpg


And Astoria Boulevard station on the BMT Astoria Line over the Grand Central Parkway:
https://commons.wikimedia.org/wiki/File:GCP_Astoria_Blvd_31st_St_BMT_jeh.JPG




How About the 3 Stacked Bridges:
Grand Central Parkway N/S @ Roosevelt Avenue E/W (Roosevelt Avenue, IRT Corona Yard Tracks, IRT #7 Main Line)

4 Bridges with 3 Stacked
Flushing Creek SW/NE @ Van Wick Expressway I-678 N/S @ Roosevelt Ave E/W
(Roosevelt Avenue, IRT Corona Yard Tracks, IRT #7 Main Line)

D-Dey65

Quote from: mapman1071 on October 04, 2017, 06:56:22 PM
How About the 3 Stacked Bridges:
Grand Central Parkway N/S @ Roosevelt Avenue E/W (Roosevelt Avenue, IRT Corona Yard Tracks, IRT #7 Main Line)

4 Bridges with 3 Stacked
Flushing Creek SW/NE @ Van Wick Expressway I-678 N/S @ Roosevelt Ave E/W
(Roosevelt Avenue, IRT Corona Yard Tracks, IRT #7 Main Line)
Only one of those is over a parkway, but as bridges themselves they all qualify. I didn't find pictures for them, but I probably could've tried to swipe the Google Street View links.

FYI, the name is "Van Wyck Expressway."  ;-)







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