I-80/I-680/SR-12 Interchange Project






Description
In order to improve safety and reduce congestion in the I-80/I-680/SR-12 corridor in Cordelia, the Solano Transportation Authority (STA) and Caltrans have collaborated to develop a new interchange design split into seven packages.


Package 1
Current Status: Completed
Map of work completed under Package 1

Package 1 mainly oversaw the construction of a new Green Valley Road overpass across I-80 along with a new connector road that connects I-80W to SR-12W.
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The new connector road from I-80W to SR-12W

Package 2A
Current Status: unknown, construction expected to start in 2020
Map of work to be completed under Package 2A

Package 2A will see:
  • the replacement of the current exit to Green Valley Road for oncoming traffic from I-80E and SR-12E
  • the construction a new overpass for SR-12E over I-80
  • the elimination of the current weave of traffic between SR-12E and I-680S that occurs on I-80E.

Package 2A was originally part of a larger Package 2, but the package was split into two parts (2A and 2B) in order to compete for funds, as Package 2A is more closely related to Package 1 than Package 2B.

Package 2B
Current Status: unknown (most likely awaiting funding)

It is currently unknown if Package 2B will be constructed separately, or if it will be incorporated into Package 3, as it has been removed from the Solano Transportation Authority (STA) website.

Package 2B would have created a new partial interchange at Red Top Road and I-680, along with a realignment of Lopes Road.

Package 3
Current Status: unknown (most likely awaiting funding)
Map of work to be completed under Package 3

Package 3 will see:
  • the construction of a new I-680N interchange
  • the realignment of Lopes Road
  • the creation of a partial interchange at Red Top Road. 
This package will also prepare for the realignment of I-680S in package 4.

Package 4
Current Status: unknown (most likely awaiting funding)
Map of work to be completed under Package 4

Package 4 will see:
  • the construction of a new connector from I-680S to SR-12 and I-80E
  • the removal of Neitzel Road
  • the widening of I-80W
  • new off-ramps at I-80W and Green Valley Road
  • new ramps at I-80E and Green Valley Road
  • new on-ramp at I-80W and Suisun Valley Road
Package 5
Current Status: unknown (most likely awaiting funding)
Map of work to be completed in Package 5
Package 5 will see:
  • the construction of a partial interchange between SR-12, Red Top Road, and Business Center Drive
  • the connection between Business Center Drive and Red Top Road
Package 6
Current Status: unknown (most likely awaiting funding)
Map of work to be completed under Package 6
Package 6 will see:
  •  the creation of an HOV (high-occupancy vehicle) lane from I-680N to I-80E
Package 7
Current Status: unknown (most likely awaiting funding)
Map of work to be completed in Package 7
Package 7 will see:
  • the construction of a connector from I-80E to I-680S
  • the construction of a connector from I-680N to I-80W
  • the construction of a connector from SR-12W to I-680S
  • the replacement of the Union Pacific Railroad Cordelia Underpass
  • the widening of SR-12E towards Suisun City
Sources
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 1
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 2
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 3 
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 4
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 5 
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 6
Solano Transportation Authority - I-80/I-680/SR-12 Interchange Project: Package 7

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