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outer drive bridge, chicago
outer drive bridge, chicago
Published: 2016/10/12
Channel: Sargeras0000
Driving over the Chicago River Outer Drive Bridge on Lakeshore Drive near downtown
Driving over the Chicago River Outer Drive Bridge on Lakeshore Drive near downtown
Published: 2016/10/31
Channel: CAMPERVAN ELVIS
Slow Drive On Outer Drive
Slow Drive On Outer Drive
Published: 2015/05/10
Channel: C N Bacil
Drive 17: Crossing the Queensboro Bridge (Outer Roadway) in New York City
Drive 17: Crossing the Queensboro Bridge (Outer Roadway) in New York City
Published: 2017/06/19
Channel: Michigan Dashcam
Williamsburg Bridge (Outer Roadway) eastbound
Williamsburg Bridge (Outer Roadway) eastbound
Published: 2011/05/22
Channel: roadwaywiz
Driving Over the Queensboro Bridge Outer Roadway
Driving Over the Queensboro Bridge Outer Roadway
Published: 2016/02/21
Channel: onthe1train
Chicago Bridge Lift Spring 2012
Chicago Bridge Lift Spring 2012
Published: 2012/06/27
Channel: Ryan Jacobs
Outer Drive Chicago
Outer Drive Chicago
Published: 2013/04/22
Channel: Carlos Perkins
The Boat Crashes to the Richmond Bridge Part 1
The Boat Crashes to the Richmond Bridge Part 1
Published: 2014/03/16
Channel: Mo B
Francis Scott Key Bridge Drive Over - Baltimore MD
Francis Scott Key Bridge Drive Over - Baltimore MD
Published: 2014/11/09
Channel: AR7271
Capital Boulevard Bridge Replacements
Capital Boulevard Bridge Replacements
Published: 2016/08/18
Channel: NCDOTcommunications
Outer Bridge Crossing -  NJ to NY ( Staten Island)
Outer Bridge Crossing - NJ to NY ( Staten Island)
Published: 2016/07/25
Channel: PP ( Pistol Pete)
Williamsburg Bridge Outer Lane
Williamsburg Bridge Outer Lane
Published: 2016/02/14
Channel: Amy & Joey's Adventures
GoPro Cycling: Reaching 35.8 mph (57.6 kmh) on Lake Shore Drive at Chicago Bike the Drive 2017
GoPro Cycling: Reaching 35.8 mph (57.6 kmh) on Lake Shore Drive at Chicago Bike the Drive 2017
Published: 2017/05/30
Channel: Nick
Driving in USA - Hampton Roads Bridge Underwater Tunnel, Norfolk Virginia
Driving in USA - Hampton Roads Bridge Underwater Tunnel, Norfolk Virginia
Published: 2012/08/31
Channel: toande77
Queensboro Bridge outer roadway
Queensboro Bridge outer roadway
Published: 2012/01/08
Channel: Duke87ofST
columbus drive bridge, chicago
columbus drive bridge, chicago
Published: 2016/10/19
Channel: Sargeras0000
Chicago River & Lake Michigan short time lapse
Chicago River & Lake Michigan short time lapse
Published: 2017/05/29
Channel: delvinj
NC Highway 12 Herbert C. Bonner Bridge - Outer Banks, NC Part 2
NC Highway 12 Herbert C. Bonner Bridge - Outer Banks, NC Part 2
Published: 2014/05/10
Channel: WallieB26
Wright Memorial Bridge - Outer Banks, North Carolina
Wright Memorial Bridge - Outer Banks, North Carolina
Published: 2014/05/06
Channel: WallieB26
Outer Bridge Crossing 1/18/15 2 of 2
Outer Bridge Crossing 1/18/15 2 of 2
Published: 2015/08/01
Channel: John Higgins
Lake Shore Drive 1937
Lake Shore Drive 1937
Published: 2014/01/08
Channel: Birute00
Williamsburg Bridge (Outer Roadway) westbound
Williamsburg Bridge (Outer Roadway) westbound
Published: 2011/05/22
Channel: roadwaywiz
Alter Bridge - Broken Wings
Alter Bridge - Broken Wings
Published: 2010/06/27
Channel: AlterBridgeVEVO
How To Drive a Trailer on the Outer Banks 4x4
How To Drive a Trailer on the Outer Banks 4x4
Published: 2014/08/21
Channel: Twiddy & Co. Vacation Realty
Driving across the Wright bridge to the Outer Banks of North Carolina in the Vw Bus
Driving across the Wright bridge to the Outer Banks of North Carolina in the Vw Bus
Published: 2013/10/30
Channel: Jeffrey Garner
Chicago
Chicago's Lakefront | FDR Memorial Bridge
Published: 2008/11/26
Channel: wttwchicago
Lansdale, PA to Hatteras, Outer Banks, NC -- Dash Cam Roadtrip
Lansdale, PA to Hatteras, Outer Banks, NC -- Dash Cam Roadtrip
Published: 2015/08/12
Channel: thewatusi0
The Address Link Bridge Dubai
The Address Link Bridge Dubai
Published: 2016/05/11
Channel: Ali Alrubaye
A Mystical Day On The Chicago River
A Mystical Day On The Chicago River
Published: 2014/07/02
Channel: C N Bacil
NC Highway 12 Temporary Bridge - Outer Banks, NC Part 3
NC Highway 12 Temporary Bridge - Outer Banks, NC Part 3
Published: 2015/02/21
Channel: WallieB26
Chicago Lakefront drive
Chicago Lakefront drive
Published: 2011/07/13
Channel: oliebaba
Driving on Outer Ring Road - Delhi, India 2017
Driving on Outer Ring Road - Delhi, India 2017
Published: 2017/09/15
Channel: Keep On Driving
First Sunny Drive North Across Queensferry Crossing Firth Of Forth Scotland
First Sunny Drive North Across Queensferry Crossing Firth Of Forth Scotland
Published: 2017/08/30
Channel: tourscotland
Outer Drive - Happy Live @ Fahrenheit 2015
Outer Drive - Happy Live @ Fahrenheit 2015
Published: 2015/05/17
Channel: Outer Drive
Washington Baum Bridge To Nags Head Beach Road Mile Post 15 - Outer Banks, NC
Washington Baum Bridge To Nags Head Beach Road Mile Post 15 - Outer Banks, NC
Published: 2014/05/06
Channel: WallieB26
Driving in USA, NC - Oregon Inlet - Bonner Bridge, North Carolina Outer Banks
Driving in USA, NC - Oregon Inlet - Bonner Bridge, North Carolina Outer Banks
Published: 2012/09/03
Channel: toande77
Mumbai Coastal Road Project
Mumbai Coastal Road Project
Published: 2017/05/17
Channel: Realty Merchant
Slow Drive South To Cross Queensferry Crossing Firth Of Forth Scotland
Slow Drive South To Cross Queensferry Crossing Firth Of Forth Scotland
Published: 2017/08/30
Channel: tourscotland
Outer Bridge Crossing 1/18/15  1 of 2
Outer Bridge Crossing 1/18/15 1 of 2
Published: 2015/08/01
Channel: John Higgins
Billy Woods Live @ Outer Drive, Sub Club
Billy Woods Live @ Outer Drive, Sub Club '04 pt.8
Published: 2009/02/27
Channel: misdevotchka
Outer Drive - Throw Down Live @ Fahrenheit 2015
Outer Drive - Throw Down Live @ Fahrenheit 2015
Published: 2015/05/17
Channel: Outer Drive
33 Outer Drive    Lambeth    MLS#542130
33 Outer Drive Lambeth MLS#542130
Published: 2014/05/25
Channel: Wayne Jewell
Torrens Rail Junction Project Progress Aug 2017 Greater Adelaide video
Torrens Rail Junction Project Progress Aug 2017 Greater Adelaide video
Published: 2017/08/20
Channel: Neil Hamilton
Tanker fire shuts down I-75 at Outer Drive in Lincoln Park
Tanker fire shuts down I-75 at Outer Drive in Lincoln Park
Published: 2015/08/20
Channel: WXYZ-TV Detroit | Channel 7
Outer Banks Shore Drive (part 1)
Outer Banks Shore Drive (part 1)
Published: 2013/06/07
Channel: esapplications
Bonner Bridge | NC Now | UNC-TV
Bonner Bridge | NC Now | UNC-TV
Published: 2015/07/06
Channel: NC Now
Bonner Bridge Replacement Project Visualization Fly-Through
Bonner Bridge Replacement Project Visualization Fly-Through
Published: 2016/01/27
Channel: HDR
roma termini
roma termini
Published: 2017/06/23
Channel: Sargeras0000
Driving the Outer Banks, North-Carolina - Nags Head to Rodanthe
Driving the Outer Banks, North-Carolina - Nags Head to Rodanthe
Published: 2016/09/19
Channel: The Roadtrip Channel
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WIKIPEDIA ARTICLE

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Outer Drive Bridge
LSD bridge open.jpg
The double-decker Outer Drive Bridge across the Chicago River
Coordinates 41°53′18.3″N 87°36′50.6″W / 41.888417°N 87.614056°W / 41.888417; -87.614056Coordinates: 41°53′18.3″N 87°36′50.6″W / 41.888417°N 87.614056°W / 41.888417; -87.614056
Carries Motor vehicles, pedestrians
Crosses Chicago River
Locale Chicago
Official name Franklin Delano Roosevelt Memorial Bridge
Characteristics
Design Double-leaf, double-deck, fixed counterweight, trunnion bascule bridge
No. of spans 264-foot
History
Designer Joseph Strauss
Construction start 1931
Construction end 1937

The Outer Drive Bridge, also known as the Link Bridge, is a double-deck bascule bridge across the Chicago River in Chicago, Illinois, United States. Construction was started in 1929 and was completed in 1937 as one of the Public Works Administration's infrastructure projects in Chicago. The bridge is officially named the Franklin Delano Roosevelt Memorial Bridge to honor the centennial anniversary of the birth of Franklin Delano Roosevelt.[1] It was planned by the Chicago Plan Commission, using Hugh E. Young as the consulting engineer, was designed by the Strauss Engineering Company, built by the American Bridge Company, and erected by Ketler and Elliot Company. It crosses near the mouth of the Chicago River.

Significance/purpose[edit]

The bridge in 1950
View of bridge towards the Chicago Harbor Lock and Lake Michigan

The building of this bridge was meant to create many jobs for Chicagoans and ease traffic flow on Michigan Avenue and in the Loop. In 1937 this structure was the longest, widest, and heaviest bascule bridge in the world.[citation needed] The Outer Drive itself, now known as Lake Shore Drive, links the south side to the north side of the city, running along the western shore of Lake Michigan. It extends from its origin in Jackson Park on the South Side of the city to the Loop, across this Outer Drive Bridge over the Chicago River, to its eventual terminus at Hollywood Avenue and Sheridan Road in the far northern end of Lincoln Park on the city's North Side.

Funds[edit]

While the completion of the Outer Drive was considered one of the most important projects in the PWA it took many years to complete. A main issue was funding. Due to a lack of provided security by Chicago Park Districts, the allotment for the bridge was revoked until the districts were all in position to comply. The total cost of the Outer Drive is estimated at $11,563,000.

Economic justification[edit]

Calculations based on a traffic flow of 40,000 vehicles per day on a saving of eight minutes between Oak Street and Seventh Street, made possible by the use of the bridge rather than Michigan Ave and on a delay cost estimated to be one cent per car per minute show that the saving in vehicle operation should amount to $584,000 per annum, which, capitalized at 5% would indicate that $23,360,000 could properly be spent to eliminate this delay. This shows that the Outer Drive bridge project is economically reasonable, showing a possible saving of $11,797,000.

Bridge operation[edit]

According to Engineering News-Record, “Each leaf is to be operated by two sets of gear trains, consisting of four sets of gear reductions. Each gear train is connected to two 100-horsepower main operating motors, only one of which is to be used at a time. The time required for opening or closing the bridge against a 28-mile-per-hour (45 km/h) wind is stated to be 57.6 seconds, of which 10 seconds is for acceleration and 2.86 seconds for deceleration. The main operating racks are bolted to the underside of the outside trusses, the pitch radius being 20 feet (6.1 m). The operating pinion, with a pitch diameter of 40 inches (100 cm), is mounted on a shaft of the gear train.

Bridge raised for sailboats, viewed looking east, toward Navy Pier

Heavy locking devices are provided at the center of the bridge and at the rigid in its closed position. The center lock in addition to holding the leaves together in their closed position, also transmits live load shear from one leaf to the other. This center lock consists of a set of four female castings bolted to the river end of one leaf, and a second set of four male units bolted to the river end of the other leaf, all castings being on the centerlines of the trusses. The male unit consists of two castings forming a toggle.

Heel or rear locks are necessary to prevent the leaves from opening when live loads pass over the part of the bridge between the trunnions and the rear break in the floor. Each leaf is provided with two pairs of rear locks, each pair being placed between the inside and outside trusses. The four locks of a leaf are connected by shafting, and operation by means of two 15-horsepower motors set either side of the centerline of the bridge” (April 22, 1937).

See also[edit]

References[edit]

  • “A Record Size Bascule,” Engineering News-Record, v. 118 (April 22, 1937): 583-587.
  • “Chicago Gets Added PWA Funds for Outer Drive Completion,” Engineering News-Record, v. 115 (December 5, 1935): 795-796.
  • “Continuous Girders Top Rigid Frame Viaduct Bents,” Engineering News-Record, V. 118 (May 6, 1937): 671-673.
  • “Lakefront Boulevard Link Forms Milestone in Chicago Plan,” Engineering News-Record, v. 118 (April 15, 1937): 546-548.

External links[edit]

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