Alexander Avenue/Danes Drive Intersection Improvement Project Now Open for Review and Comment

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Date: December 23, 2011
Contact: Steve Ortega, National Park Service, , 415-561-2841
Contact: Harvey Katz, Golden Gate Bridge District, , 415-257-4416

Marin County CA - The National Park Service, in cooperation with the Golden Gate Bridge Highway and Transportation District, announces that the Environmental Assessment/Initial Study (EA/IS) for proposed improvements to the Alexander Avenue/Danes Drive intersection opened December 23, 2011 for a 30-day public comment period.

The EA/IS is on the internet at, or at San Francisco Libraries (Main, Marina, Anza, Presidio and Sunset Branches), and Belvedere-Tiburon, Corte Madera County, Marin City, Mill Valley and Sausalito Public Libraries.

The purpose of the project is to correct existing deficiencies and substandard roadway conditions at the Alexander Avenue left-turn lane to Danes Drive. The project would also help to reduce offsite transportation impacts associated with intensified operation of Fort Baker by improving the Alexander Avenue/Danes Drive intersection functionality and enhancing multi-modal use opportunities along Alexander Avenue.The project identifies actions within the project area that address a number of deficient multi-modal transportation conditions including: inadequate roadside shoulder width to handle shared bicycle, pedestrian, and automobile use; and skewed intersection geometry.

All of the action alternatives would result in the reconfiguration of the Alexander Avenue/Danes Drive intersection, lengthening of the left-turn lane along Alexander Avenue, and widening of the shoulders along both sides of Alexander Avenue within the project limits. The Agency Preferred Alternative is the 8-Foot Rockfall Catchment Alternative (Alternative D).

The other action alternatives, the 16-Foot Rockfall Catchment Alternative (Alternative B), and the 5-Foot

Rockfall Catchment Alternative (Alternative C) vary from the Preferred Alternative in the extent of excavation required for the improvements to Alexander Avenue and the method for reducing rockfall hazards associated with the cut slope along the east-side of Alexander Avenue.

Public comments can be submitted online at

Or mailed to:


Attn: Alexander Avenue/Danes Drive EA
Golden Gate National Recreation Area
Fort Mason, Building 201
San Francisco, CA 94123 - 1307

Comments must be received by January 27, 2012.

Please note that names and addresses of people who comment become part of the public record. The NPS will make all submissions from organizations, businesses, and individuals who identify themselves as representatives or officials of organizations or businesses available for public inspection in their entirety. Anyone who wishes as a private individual for their name and/or address to be withheld must state this at the beginning of their comment.


Last updated: February 28, 2015

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