The Sonoma-Marin Area Rail Transit District (SMART) proposes a short extension to a 43-mile, 10-station, commuter rail initial operating segment (IOS) that is currently under construction with local funds between downtown San Rafael and Sonoma County Airport. The extension would operate from downtown San Rafael to the Golden Gate Transit Larkspur Ferry terminal in Marin County. The project includes one new station in Larkspur near the ferry terminal, five public at-grade roadway crossings including signals and crossing equipment, refurbishment of one existing railroad trestle bridge, and replacement of another trestle bridge. SMART owns the rail right-of-way and is procuring the needed diesel multiple unit rail vehicles as part of the locally-funded IOS. Thus, no additional vehicles are needed for the extension project. On weekdays, the service is planned to operate every 30 minutes during peak periods. During weekday off-peak periods, one mid-day train is planned, while four trains would be offered on weekends.