Caltrans proposes to relieve traffic congestion on I-880 and improve access between the State Route 238/Mission Boulevard corridor and I-880 in the Fremont and Union City area by evaluating alternative travel routes within Southern Alameda County. Alternatives include a no-build alternative, a transportation system management alternative and four alignment alternatives.

"The I-94 East-West Corridor study area is from 70th Street to 16th Street, a distance of about 3.5 miles. This corridor has safety issues, closely spaced interchanges, a combination of left-hand and right-hand exit and entrance ramps, and deteriorated pavement. As traffic increases, safety and traffic operations on this corridor will continue to deteriorate. By 2050, increased traffic volumes will cause nearly this entire section of I-94 to operate at level of service D to F during peak periods. The Final Environmental Impact Statement (EIS) was approved in 2016. The Final EIS evaluated the social, environmental, and economic impacts of the No-build alternative and a range of Build Alternatives, as well as the extent to which these alternatives address the project’s purpose and need. WisDOT and FHWA prepared a Supplemental EIS to incorporate the most up-to-date data, updated environmental regulations, changes to the alternatives, and public and agency input since the 2016 Final EIS."-- Abstract