Signs at strategic locations warn drivers of the extended weekend road closure.
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The Presidio Parkway serves as a gateway to the Golden Gate Bridge.
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Crews will be working around the clock during the closure.
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This tunnel is quiet now, but come Monday morning, traffic will begin to flow through it.
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The new Parkway offers three lanes in each direction, with a fourth auxiliary lane along portions of the southbound direction.
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During the closure, crews will need to bust through barriers to connect the tunnels with active traffic lanes.
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A worker puts finishing touches on one of the viaducts.
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The route features two pairs of tunnels whose roofs will be landscaped to blend in with the environment.
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On July 8 the PR team took the media on a tour of the largely completed Presidio Parkway, a complex of ground-level roadways, viaducts and tunnels that are replacing the Doyle Drive connection to the Golden Gate Bridge. Hooking these pieces up into a seamless corridor will require substantial work under tight deadlines during the 3.5-day weekend closure from July 9-13, 2015.