September 12, 2008

CONSULTANT CONTRACT AWARDED FOR
MOVEABLE MEDIAN BARRIER
ENVIRONMENTAL STUDIES & PRELIMINARY DESIGN

 

On Friday, September 12, 2008, the Golden Gate Bridge, Highway and Transportation District’s Board of Directors approved the following actions relative to Environmental Studies and Preliminary Design for a Moveable Median Barrier (MMB) on the Golden Gate Bridge (Bridge):

  1. Authorized the General Manager to execute a Professional Service Agreement with DMJM Harris, San Francisco, CA, in an amount not to exceed $2,780,000, subject to the District receiving Federal Highway Administration (FHWA) and the California Department of Transportation’s (Caltrans) approvals of the Agreement; and,
  2. Authorized a contingency fund for Contract No. 2008-B-5, in the amount of $278,000.

 

On March 11, 2005, the Board adopted authorized the Board President to form an Advisory Committee of the Board to work with staff to identify and pursue funding for proceeding with environmental studies and preliminary design work for a MMB system.

Subsequently, in 2008, the District secured federal and state funds for the project. On June 6, 2008, the District issued a Request for Proposals for the Environmental Studies and Preliminary Design for a Moveable Median Barrier on the Golden Gate Bridge, to engineering, planning and architectural consultants.

The scope of the services generally consists of:

  • Preparing environmental studies pursuant to state and federal requirements.
  • Developing preliminary design and cost estimates for the MMB system, including facilities to store and maintain the barrier transfer machines.
  • Exploring, developing, evaluating and reviewing, from a traffic operations and environmental perspective, potential design variations for a MMB on the Bridge.

The contract total is $2.78 million and the total project cost, including District staff and other miscellaneous, is $3.8 million.

 

TENTATIVE PROJECT TIMELINE - Click here for current project timeline.
Late October 2008: work will begin immediately following necessary approvals from FHWA and Caltrans. The approvals are anticipated do take about 30 days.
Spring 2010: Preliminary Engineering and Environmental process is anticipated to take about 20 months
Summer 2010: Complete Design
End of 2011: Implement the MMB system on the Golden Gate Bridge.

 

Moveable Median Barrier System
With its narrow roadway lanes and tight curves at either end, coupled with its traffic volumes and frequently foggy and windy conditions, the installation of a one-foot-wide MMB is a proposed safety enhancement intended to eliminate crossover collisions on the Golden Gate Bridge. The MMB system includes the barrier – 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 – and the barrier transfer machines.

 

Moveable Barrier Total Project Cost is $25 million

  • $20 million allocated from the Metropolitan Transportation Commission
  • $490,000 allocated federal funds
  • Remainder will come from toll revenues.

 

Golden Gate Bridge Accident Rate is 3 times Lower Now than in the 1980s
The accident rate on the Golden Gate Bridge is now three times lower that what it was in the 1980s largely due to the reduction in the speed limit, enforcement, and driver education and awareness. Since 1970 there have been 36 fatalities of which 16 were from head-on collisions. The smooth and safe flow of traffic across the 1.7 mile long Bridge has been enhanced through a number of operational and safety features including the reduction of the speed limit to 45 MPH, increased law enforcement patrols and increased use of radar, and establishing the Bridge as a special driving zone.

For more background on the Moveable Median Barrier project, click here.