Liberty Bridge

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Crews have begun replacing the deck of Pittsburgh's Liberty Bridge, one of the busiest arteries crossing the Monongahela River and leading to the city's southern suburbs.

PennDOT says crews will replace the deck one lane at a time in four phases over roughly 160 days.

That will enable crews to keep at least one inbound and one outbound lane open at all times. The available lanes will shift throughout the day, according to the flow of traffic in and out of the city, especially during rush hours.

The project will cost about $80 million.

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Around 55,000 commuters who cross the Liberty Bridge on a daily basis may need to choose a different route starting this month.

An $80.08 million renovation project begins at the end of April and finishes sometime in 2018, according to PennDOT District 11 spokesman Steve Cowan.

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The 90-year old structurally deficient Liberty Bridge will undergo its first major renovation in 30 years starting in April.

“It’s due,” said state Department of Transportation District Executive Dan Cessna.

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City of Bridges: The following report is the first is a three-part series examining the status of Pittsburgh bridges as the Pennsylvania Legislature considers funding for transportation infrastructure.

The Pittsburgh area is home to hundreds of bridges — by some counts, more than any city in the world.

It also has a higher percentage of structurally deficient bridges than any other U.S. city. If your goal is to highlight the problem, one in particular makes a pretty good backdrop.