No on Proposition G
Allowing Private Vehicles on the Great Highway in Sunset Dunes Park
What is it?
Prop G would close Sunset Dunes Park and reopen the Upper Great Highway to cars for most of the week. It restores a version of the weekend compromise that ran from 2022 to 2024: the road will be closed to private vehicles from Friday at 6:00 p.m. through Monday at 4:00 a.m., and on holidays.
Reopening the road to cars would require a coastal development permit from the California Coastal Commission, and possibly other approvals.
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Fiscal impacts
According to the Controller's Office, opening the roadway to private vehicles would significantly increase the cost of government: about $9.8M in one-time capital costs, plus $500,000 to $1.9M per year.
The one-time costs are mostly traffic signals. The Controller estimates $8.8M for new signals at 8 intersections, $750,000 to remove park elements and restore the roadway, and $200,000 for restriping and signage. Signals need a full upgrade roughly every 30 years.
The annual costs cover signal maintenance, roadway maintenance and replacement, and more sand removal and dune reshaping. Sand work alone would run $100,000 to $1.5M more per year than today. For comparison, sand removal and dune reshaping cost about $290,000 in FY 2024-25 and $330,000 in FY 2025-26 with the road closed, against about $860,000 in FY 2022-23 and $420,000 in FY 2023-24 when it was open on weekdays. Running the space as a road on weekdays would cut park staffing, which costs about $300,000 per year for 1.5 positions.
The measure also requires a coastal development permit, which may add studies or conditions that raise costs further. Signals at Sloat Boulevard would force changes to the Ocean Beach Climate Change Adaptation Project, which could add redesign costs.
Why is this on the ballot?
In November 2024, San Francisco voters approved Prop K, which closed the Upper Great Highway to private vehicles at all times, and the City converted the roadway into Sunset Dunes Park in 2025. Supporters of this measure gathered signatures to put the question back before voters. They submitted 15,924 signatures, and on July 23, 2026, the Department of Elections certified that the petition had more than the 10,615 valid signatures required (2% of the city's registered voters).
This was placed on the ballot by collecting signatures from voters. It needs simple majority of 50% + 1 to pass.
- Placed on ballot by: Voter signature petition, certified by the Department of Elections on July 23, 2026.
Why vote No?
San Francisco has voted on this twice. In 2022, we rejected a measure to keep cars on the Great Highway, 65% to 35%. In 2024, we passed Prop K and built Sunset Dunes. The park is a hit: 1.7 million visits in its first year, more than half of them on weekdays (the very days Prop G would give back to cars).
Prop G asks the whole city to vote on the same question a third time, and it would require a fourth election to ever adjust the hours. This is exactly the broken process Prop D fixes: about 10,600 signatures can put any settled question back on your ballot, again and again, forever.
Vote no on Prop G. Let's all move on.