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George Rogers Clark Memorial Bridge

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A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end (called cantilevers ). For small footbridges , the cantilevers may be simple beams ; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel , or box girders built from prestressed concrete .

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40-541: The George Rogers Clark Memorial Bridge , known locally as the Second Street Bridge , is a four-lane cantilevered truss bridge crossing the Ohio River between Louisville, Kentucky , and Jeffersonville, Indiana , that carries US 31 . Debate to build a highway bridge connecting Louisville to Jeffersonville began in 1919. Both cities and the public were in favor of building the bridge, but how to fund

80-423: A balanced cantilever ; when they attach to a solid foundation, the counterbalancing arms are called anchor arms . Thus, in a bridge built on two foundation piers, there are four cantilever arms: two which span the obstacle, and two anchor arms that extend away from the obstacle. Because of the need for more strength at the balanced cantilever's supports, the bridge superstructure often takes the form of towers above

120-505: A bridge that could handle differential settlement of the foundations. Engineers could more easily calculate the forces and stresses with a hinge in the girder. Heinrich Gerber was one of the engineers to obtain a patent for a hinged girder (1866) and is recognized as the first to build one. The Hassfurt Bridge over the Main river in Germany with a central span of 124 feet (38 metres)

160-481: A comprehensive analysis of the Total Societal Cost (TSC) associated with toll collection as a means of taxation. TSC is the sum of administrative, compliance, fuel and pollution costs. In 2000 they estimated it to be $ 56,914,732, or 37.3% of revenue collected. They also found that a user of a toll road is subject to a form of triple taxation, and that toll collection is a very inefficient means of funding

200-569: A dedicated source of funds for ongoing maintenance and improvements. Sometimes citizens revolt against toll plazas, as was the case in Jacksonville, Florida . Tolls were in place on four bridges crossing the St. Johns River, including I-95. These tolls paid for the respective bridges as well as many other highway projects. As Jacksonville continued to grow, the tolls created bottlenecks on the roadway. In 1988, Jacksonville voters chose to eliminate all

240-725: A month. Locally, the Clark Bridge is known as the Second Street Bridge due to its direct alignment onto Second Street in Louisville. There is a pedestrian sidewalk on each side of the bridge deck. The Clark Bridge was previously the only regional Ohio River bridge open to non-motorized traffic, until the opening of the Indiana side of the nearby Big Four Bridge to pedestrian and bicycle traffic in May 2014. Since 1991,

280-633: A public finance economist at MIT, reports that as the fraction of drivers using electronic toll collection increased, typically toll rates increased as well, because people were less aware of how much they were paying in tolls. Electronic tolling proposals that represented the shadow price of electronic toll collection (instead of the TSC) may have misled decision-makers. The general public has additionally endured an increased administrative burden associated with paying toll bills and navigating toll collection company on-line billing systems. Additionally, visitors to

320-402: A region may incur e-toll tag fees imposed by their rental car company. The Paperwork Reduction Act of 1980 identified and attempted to address a similar problem associated with the government collection of information. Approvals were to be secured by government agencies before promulgating a paper form, website, survey or electronic submission that will impose an information collection burden on

360-490: A second worker died falling from the bridge and landing on a barge. President Herbert Hoover dedicated the bridge at its opening. It was opened to the public on October 31, 1929, as the Louisville Municipal Bridge and operated as a toll bridge. The toll was 35 cents until December 31, 1936, when it was lowered to 25 cents. The last of the bonds that financed the construction were redeemed in 1946, and

400-406: Is available to support the tension in the upper chord of the span during construction, usually limiting this method to the spanning of narrow canyons. World's longest cantilever bridges (by longest span): Toll bridge A toll bridge is a bridge where a monetary charge (or toll ) is required to pass over. Generally the private or public owner, builder and maintainer of the bridge uses

440-499: Is featured in a scene from the 1981 movie Stripes in which Bill Murray drives his cab to the middle of the span, gets out of the vehicle and then tosses his keys into the river below. Cantilever bridge The steel truss cantilever bridge was a major engineering breakthrough when first put into practice, as it can span distances of over 1,500 feet (450 m), and can be more easily constructed at difficult crossings by virtue of using little or no falsework . Engineers in

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480-637: The James River , and the 4.5-mile long James River Bridge 80 miles downstream which carries U.S. Highway 17 across the river of the same name near its mouth at Hampton Roads . In other cases, especially major facilities such as the Chesapeake Bay Bridge near Annapolis, Maryland , and the George Washington Bridge over Hudson River between New York City and New Jersey , the continued collection of tolls provides

520-465: The Navajo Bridge ) are built using pure cantilever spans from each side, with neither falsework below nor temporary supporting towers and cables above. These are then joined with a pin, usually after forcing the union point apart, and when jacks are removed and the bridge decking is added the bridge becomes a truss arch bridge . Such unsupported construction is only possible where appropriate rock

560-432: The "Toll Collect" syndicate after much negative publicity. The term "Toll Collect" became a popular byword among Germans used to describe everything wrong with their national economy. It has become increasingly common for a toll bridge to only charge a fee in one direction. This helps reduce the traffic congestion in the other direction, and generally does not significantly reduce revenue, especially when those travelling

600-435: The 19th century understood that a bridge that was continuous across multiple supports would distribute the loads among them. This would result in lower stresses in the girder or truss and meant that longer spans could be built. Several 19th-century engineers patented continuous bridges with hinge points mid-span. The use of a hinge in the multi-span system presented the advantages of a statically determinate system and of

640-525: The Clark Memorial Bridge, a three-block area from Main Street to River Road, which transformed the area into a plaza. It included a new decorative lighting system under the refurbished Clark Memorial Bridge, wide sidewalks, seats, new pedestrian and festival areas, and extensive plantings, making it an inviting promenade for the recently constructed and neighboring KFC Yum! Center . The project

680-415: The action of the outer foundations. Cantilever Bridge.—A structure at least one portion of which acts as an anchorage for sustaining another portion which extends beyond the supporting pier. A simple cantilever span is formed by two cantilever arms extending from opposite sides of an obstacle to be crossed, meeting at the center. In a common variant, the suspended span , the cantilever arms do not meet in

720-560: The bridge has been used as "ground zero" for the annual Thunder Over Louisville event, when a waterfall of fireworks flows along the entire length of the bridge during the fireworks show. This involves traffic being closed for much of the week. This is criticized as it cuts off both the only non-interstate and, prior to the Big Four Bridge reopening, the only pedestrian route between Louisville and southern Indiana, which can impact local businesses such as bicycle couriers. The bridge

760-525: The bridge to recoup their investment. The bridge was designed by Ralph Modjeski and Frank Masters with architectural details handled by Paul Philippe Cret of Philadelphia . Construction of the approaches and administration buildings began in 1926, and construction of the bridge itself began in June 1928 by the American Bridge Company of Pittsburgh at a cost of $ 4.7 million. The bridge

800-423: The center; instead, they support a central truss bridge which rests on the ends of the cantilever arms. The suspended span may be built off-site and lifted into place, or constructed in place using special travelling supports. A common way to construct steel truss and prestressed concrete cantilever spans is to counterbalance each cantilever arm with another cantilever arm projecting the opposite direction, forming

840-411: The development of highway infrastructure. Nakamura and Kockelman (2002) show that tolls are by nature regressive, shifting the burden of taxation disproportionately to the poor and middle classes. Electronic toll collection , branded under names such as EZ-Pass, SunPass, IPass, FasTrak, Treo, GoodToGo, and 407ETR, became increasingly prevalent to metropolitan areas in the 21st century. Amy Finkelstien,

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880-484: The financial stress of lost toll revenue to the authority determining the levy. One such example of shunpiking as a form of boycott occurred at the James River Bridge in eastern Virginia . After years of lower-than-anticipated revenues on the narrow privately funded structure built in 1928, the state of Virginia finally purchased the facility in 1949 and increased the tolls in 1955 without visibly improving

920-648: The foundation piers. The Commodore Barry Bridge is an example of this type of cantilever bridge. Steel truss cantilevers support loads by tension of the upper members and compression of the lower ones. Commonly, the structure distributes the tension via the anchor arms to the outermost supports, while the compression is carried to the foundations beneath the central towers. Many truss cantilever bridges use pinned joints and are therefore statically determinate with no members carrying mixed loads. Prestressed concrete balanced cantilever bridges are often built using segmental construction . Some steel arch bridges (such as

960-523: The funds for two additional bridges (for motor vehicles only) that carry interstate highways came from the federal government . The bridge was placed on the National Register of Historic Places on March 8, 1984, as the Louisville Municipal Bridge, Pylons and Administration Building. In June 2010, Kentucky Governor Steve Beshear and Louisville Mayor Jerry Abramson announced a new $ 3 million streetscape improvement project directly underneath

1000-555: The general public. However, the act did not anticipate and thus address the burden on the public associated with funding infrastructure via electronic toll collection instead of through more traditional forms of taxation. In some instances, tolls have been removed after retirement of the toll revenue bonds issued to raise funds. Examples include the Robert E. Lee Memorial Bridge in Richmond, Virginia which carries U.S. Route 1 across

1040-445: The mayor of Jeffersonville expressed concern about the possible effects of increased traffic on the bridge's structural integrity. These concerns were heightened by the discovery of a cracked girder and other structural issues (since repaired) during a routine 2014 inspection. On March 1, 2024, a Sysco semi-truck headed towards Indiana was hit by an oncoming pickup truck, causing the semi driver to immediately lose control just north of

1080-488: The middle pier. The semi hurtled through the west railing of the bridge, leaving the cab hanging perilously over the Ohio River. The semi driver, who suffered minor injuries in the actual collision, was rescued 45 minutes after the crash, which also involved three other vehicles and sent one driver to the hospital with life-threatening injuries. Due to the incident, the bridge was partially closed for repairs for more than

1120-571: The new Abraham Lincoln Bridge for northbound I-65 traffic; and building the Lewis and Clark Bridge to connect I-265 in the two states. The two I-65 crossings and the I-265 bridge are now tolled to pay for the project. One consultant who worked on a transportation study for the Kentucky government predicted that traffic on the bridge would increase by 25% once tolling on the other bridges started, and

1160-416: The one direction are forced to come back over the same or a different toll bridge. A practice known as shunpiking evolved which entails finding another route for the specific purpose of avoiding payment of tolls. In some situations where the tolls were increased or felt to be unreasonably high, informal shunpiking by individuals escalated into a form of boycott by regular users, with the goal of applying

1200-400: The project was unclear. In 1926 a ballot measure was voted down by residents which would have allowed the government to fund the bridge construction. A similar measure to fund the bridge construction with municipal insured bonds was voted down shortly after. Officials finally agreed to authorize a private company to construct the bridge using private funds, and they were granted authority to toll

1240-474: The river Thames opened as a toll bridge, but an accumulation of funds by the charitable trust that operated the bridge ( Bridge House Estates ) saw that the charges were dropped. Using interest on its capital assets, the trust now owns and runs all seven central London bridges at no cost to taxpayers or users. In the United States, private ownership of toll bridges peaked in the mid-19th century, and by

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1280-431: The structural principles of the suspended span cantilever by sitting in chairs and supporting their colleague, Kaichi Watanabe , in between them, using just their arms and wooden poles. The suspended span, where Watanabe sits, is in the center. The wooden poles resist the compression of the lower chord , while the outstretched arms support the tension of the upper chord. The placement of the brick counterweights demonstrates

1320-593: The toll booths and replace the revenue with a ½ cent sales tax increase. In 1989, the toll booths were removed, 36 years after the first toll booth went up. In Scotland , the Scottish Parliament purchased the Skye Bridge from its owners in late 2004, ending the requirement to pay an unpopular expensive toll to cross to Skye from the mainland. In 2004, the German government cancelled a contract with

1360-503: The toll to recoup their investment, in much the same way as a toll road . The practice of collecting tolls on bridges harks back to the days of ferry crossings where people paid a fee to be ferried across stretches of water. As boats became impractical to carry large loads, ferry operators looked for new sources of revenue. Having built a bridge, they hoped to recoup their investment by charging tolls for people, animals, vehicles, and goods to cross it. The original London Bridge across

1400-438: The tolls were removed. On January 17, 1949, the bridge was renamed in honor of George Rogers Clark , recognized as the founder of Louisville and neighboring Clark County, Indiana. The bridge was rehabilitated in 1958. There was a movement in the 1950s to restore tolls, as traffic on the bridge had reached capacity and funding was needed for an additional bridge, but a toll was opposed strongly by most residents. Ultimately most of

1440-422: The turn of the 20th century most toll bridges were taken over by state highway departments. In some instances, a quasi-governmental authority was formed, and toll revenue bonds were issued to raise funds for construction or operation (or both) of the facility. Peters and Kramer observed that "little research has been done to quantify the impact of toll collection on society as a whole" and therefore they published

1480-574: Was 275 feet (84 metres) deep and took full advantage of the fact that falsework, or temporary support, is not needed for the main span of a cantilever bridge. The Forth Bridge is a notable example of an early cantilever bridge. This bridge held the record for longest span in the world for twenty-nine years until it was surpassed by the Quebec Bridge . The engineers responsible for the bridge, Sir Benjamin Baker and Sir John Fowler , demonstrated

1520-550: Was completed in 1867 and is recognized as the first modern cantilever bridge. The High Bridge of Kentucky by C. Shaler Smith (1877), the Niagara Cantilever Bridge by Charles Conrad Schneider (1883) and the Poughkeepsie Bridge by John Francis O'Rourke and Pomeroy P. Dickinson (1889) were all important early uses of the cantilever design. The Kentucky River Bridge spanned a gorge that

1560-667: Was completed in time for the October 2010 opening of the arena. CARMAN provided the landscape architecture and civil engineering services for the 2010 streetscape project. The bridge was expected to see significant increases in traffic following the completion of the Ohio River Bridges Project near the end of 2016. The project included repurposing the John F. Kennedy Memorial Bridge , which previously carried I-65 in both directions, for southbound traffic only; building

1600-587: Was constructed using a newly invented method. Rather than build out from the shore, the bridge was constructed from the center towards land. The new method proved successful, and was subsequently used in the construction of many other bridges including the Oakland Bay Bridge in San Francisco a few years later. Newspapers reported two deaths during the construction of the bridge. The first worker died in 1929 after being struck by an iron crank, and

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