On October 26, 2012, the Board of Directors approved proceeding with the final design and preparation of the construction bid documents for installation of a Moveable Median Barrier. The Board also authorized the filing of a Notice of Exemption based upon the environmental studies finding the project to be exempt from the requirements of the California Environmental Quality Act. The resulting reports are available below:
- December 2014: Transportation Management Plan
- January 2014: Final Environmental Site Assessment and Limited Site Investigation
- February 2013: Traffic Engineering and Analysis Report
- February 2013: Traffic Engineering and Analysis Report Appendix
- December 3, 2012: NEPA Clearance from Caltrans
- November 20, 2012: Notice Exemption San Francisco County
- November 20, 2012: Notice Exemption Marin County
- January 2012: Section 4(f) DE MINIMIS FINDING
- January 2012: Visual Impact Assessment
- October 2011: Finding of Effect
- December 2011: Natural Environment Study (Minimal Impact)
The Moveable Median Barrier (MMB) system includes about 13,340 feet of barrier consisting of 12-inch wide and 32-inch high steel clad units filled with high density concrete tightly pinned together to form a semi-rigid median barrier. The system also includes two barrier transfer machines, aka “zipper” trucks. The installation of the one-foot wide MMB would virtually eliminate crossover collisions.
The project budget is estimated at $30.3 million with funding coming from three sources: $20 million (66%) from the Metropolitan Transportation Commission via the State of California; $1,379,200 (5%) in federal funds; and $5,120,800 (19%) from Golden Gate Bridge toll revenues.