Signs at strategic locations warn drivers of the extended weekend road closure.
The Presidio Parkway serves as a gateway to the Golden Gate Bridge.
Crews will be working around the clock during the closure.
This tunnel is quiet now, but come Monday morning, traffic will begin to flow through it.
The new Parkway offers three lanes in each direction, with a fourth auxiliary lane along portions of the southbound direction.
During the closure, crews will need to bust through barriers to connect the tunnels with active traffic lanes.
A worker puts finishing touches on one of the viaducts.
The route features two pairs of tunnels whose roofs will be landscaped to blend in with the environment.
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.