High Five Interchange

The High Five Interchange is one of the first five-level stack interchanges built in Dallas, Texas. Located at the junction of the Lyndon B. Johnson Freeway (Interstate 635, or I-635) and the Central Expressway (U.S. Highway 75, or US 75), it replaces an antiquated combination interchange constructed in the 1960s.

The $261-million (equivalent to $408 million in 2022) project was started in 2002 and completed in December 2005. It was designed by HNTB and built by Zachry Construction Corporation.

The interchange is considered by Popular Mechanics to be one of "The World's 18 Strangest Roadways" because of its height (as high as a 12-story building), its 43 permanent bridges, and other unusual design and construction features. In 2006, the American Public Works Association (APWA) named the High Five Interchange as "Public Works Projects of the Year".

 High Five Interchange under construction in 2005

The High Five Interchange project was planned as a replacement for the existing antiquated interchange, which accommodated 500,000 vehicles daily and was located in one of the most intensely developed commercial zones in Dallas. It was a collaborative project between the TxDOT, affected motorists and property owners, and the primary contractor, Zachry Construction. An essential consideration was to complete the project with as little disruption to the traffic flow as possible.[1]

Reasons for upgrading the interchange, in addition to the need to increase traffic flow and reduce congestion, were to improve air quality, safety, and local access.[2]

Zachry Construction Corporation submitted the lowest bid and was awarded the $261-million (equivalent to $408 million in 2022[3]) contract by TxDOT, the largest ever by that agency. The construction contract for the High Five Interchange was unique in that it contained elements not found in other construction project contracts.[4] For example, it specified the concrete maturity method to be used to ensure the concrete's strength (the first time TxDOT had ever done so) and contained an early-completion bonus, a sliding scale of up to $11 million (equivalent to $17.2 million in 2022[3]) if the company completed the contract within four years.[5] Also built into the construction contract was a provision that Zachry be charged for "lane rentals" by TxDOT for time they closed down traffic lanes—fees based on hourly assessments and the time of day the lane was closed. The fees ranged from $50 to a high of $110,000 for rush hours (equivalent to $78 to $170,000 in 2022[3]).[4] In order not to interfere with traffic flow during construction, the new interchange was designed largely as elevated flyover ramps and viaducts so they could be built high over the existing junction lanes; once traffic was transferred to the new structures, the old lanes could simply be closed off and removed. Little of the original interchange remained when the project was finished.[2]

To save time and money, innovative construction methods were employed: The original plans called for the segments of the long ramps and spans (used to direct-connect roads) to be made of steel, but, because building with steel would interfere with heavy traffic flow during construction, cast-in-place segmental concrete was substituted in the plans. Zachry decided, however, to use precast concrete segmental bridges, rather than casting the bridge elements in place, and used a unique machine, designed and constructed by Deal S.R.L. of Italy and costing about $1 million (equivalent to $1.56 million in 2022[3]), to move the pieces into place.[4][6]

During the construction, 2.2 million cubic yards (1.7×10^6 m3) of earthwork was used, 350,000 cubic yards (270,000 m3) of concrete was mixed on site, and 300,000 cubic feet (8,500 m3) of retaining walls were built. Additionally, 40,000 feet (12,000 m) of drilled shafts and 75,000 linear feet (23,000 m) of drainage pipe were completed. In addition to the construction of 43 permanent bridges, six temporary bridges were built, resulting in 2.3 million cubic feet (0.065×10^6 m3) of bridge deck.[7]

The project was designed b HNTB,[8] who provided professional engineering consultation throughout the construction,[5] which had begun in 2002 and was completed in December 2005, more than 13 months sooner than planned.[9]

^ "Local Control - Success Stories". Texas Department of Transportation. Archived from the original on April 15, 2012. Retrieved January 2, 2012. ^ a b Skains, Wesley (Winter 2004). "High Fives: Major Dallas Freeway Interchange Is Truly Texan in Scale, Aesthetics" (PDF). Coatings Solutions. Sherwin-Williams. pp. 10–12. Archived from the original (PDF) on November 19, 2011. Retrieved January 2, 2012. ^ a b c d Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the Measuring Worth series. ^ a b c Cite error: The named reference recht was invoked but never defined (see the help page). ^ a b Case Study: Dallas High-Five Interchange Project; Dallas, Texas (PDF) (Report). Engius. Archived from the original (PDF) on March 5, 2016. Retrieved January 3, 2012. ^ Knutson, Kraig; Schexnayder, Clifford J.; Fiori, Christine M.; Mayo, Richard (2009). "Dallas High Five Project". Construction Management Fundamentals (2nd ed.). McGraw Hill Education. ISBN 978-0-07-340104-1. Archived from the original on May 13, 2012. Retrieved January 3, 2012.[page needed] ^ Cite error: The named reference judgesawards2 was invoked but never defined (see the help page). ^ Cite error: The named reference apwa_award was invoked but never defined (see the help page). ^ Cite error: The named reference txdot_history was invoked but never defined (see the help page).
Photographies by:
Statistics: Position
7796
Statistics: Rank
6126

Add new comment

Esta pregunta es para comprobar si usted es un visitante humano y prevenir envíos de spam automatizado.

Security
467281953Click/tap this sequence: 2451

Google street view

Where can you sleep near High Five Interchange ?

Booking.com
487.402 visits in total, 9.187 Points of interest, 404 Destinations, 28 visits today.