Six Lane Expansion
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Proposed Construction: (updated 6-3-2005) The existing four lane interstate facility between Lincoln and Omaha will be expanded to six lanes. The work will be split into eight projects starting west of Lincoln at the NW 56th Street overhead structure to the west side of Omaha at the N-370 Interchange. The proposed improvements will include:
· Increasing capacity of I-80.
· Reconstructing pavement with some nearly 40 years old.
· Improving median widths to provide safer typical.
· 12’ wide inside and outside paved shoulders.
· Improved horizontal & vertical alignments.
· Flatter side slopes providing safer recovery area for errant vehicles.
· Overhead structures changed to two span bridges, widened, and sight distance improved. MSE walls will be used to reduce I-80 obstacles.Interchanges reconstructed to provide safer acceleration/deceleration access to I-80. Interchanges with accesses close to ramps will be moved to 660’ from ramp terminals.
Lincoln to Omaha encompasses the following:
Related Studies: (updated 6-3-2005) There are three median types for the proposed six lane: The first two are a 76’ and 88' median with a depressed grass median. The third type is a 28' paved median with a concrete barrier rail separating the traffic.
Phasing: Work shall be done under traffic with 2 lanes of traffic available throughout the entire construction.
The 28' median will build temporary pavement on the first phase, which will allow the traffic to be placed head-to-head. The other side will then be completely constructed. Traffic will be switched to the new pavement and allow the construction of the remaining pavement.
Schedule: The first project is Ruff Road to N-370, which started in the spring of 2003, and will be completed by 2005. In 2005, the US-77 south to I-180 will be started, with the final project between Lincoln and Omaha being the 56th Street Interchange to Waverly Interchange to be constructed in 2009. The entire six-lane expansion will be completed by 2012.
Estimated Cost: The cumulative projects from NW 48th Street Interchange to N-370 will cost $380 million.