DATE: February 23, 2021
TO: Mayor and City Council
FROM: Director of Public Works
SUBJECT
I-880/Winton Ave and I-880/A Street Interchange Improvement Project: Select Preferred Alternative for the A Street Improvements to Present to Alameda County Transportation Commission for the I-880/Winton Ave and I-880/A Street Interchange Improvement Project
RECOMMENDATION
That Council reviews this report and selects a preferred project alternative for the A Street Improvements to present to Alameda County Transportation Commission (Alameda CTC) to move forward to the environmental document project phase.
SUMMARY
The City, in partnership with Alameda CTC, the implementing agency, and the California Department of Transportation (Caltrans) propose to provide interchange improvements at the Winton Avenue and A Street interchanges along the I-880 corridor.
There are several alternatives proposed to add an auxiliary lane on I-880 in both directions between the Winton Avenue and A Street interchanges, along with interchange improvements. After a cooperative evaluation with the Project Development Team, Caltrans, Alameda CTC, and City staff, the project team is proposing Mainline improvements to the Caltrans freeway right-of-way, one improvement scenario on Winton Avenue (Alternative W2) and three improvement alternatives (Alternatives A1, A2, and A3) on A Street as shown on Attachment III. All proposed alternatives are compared to the no-build scenario or existing condition in order to measure the impacts of each alternative. Staff is only seeking direction from Council on the three A Street alternatives since the project team has already narrowed down the proposed improvements for the Mainline and Winton Avenue areas. The following provides a summary of the Mainline, Winton Avenue, and three A Street alternatives:
Mainline Improvements. Mainline improvements would include restriping of the existing outside shoulder of I-880 along the I-880 mainline be...
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