Proposition G

Allowing Private Vehicles on the Great Highway in Sunset Dunes Park

Proposition G would close Sunset Dunes Park from Monday at 4:00 a.m. through Friday at 6:00 p.m., unless a holiday falls on a weekday, in order to reopen the roadway known as the Upper Great Highway to private vehicles during that time.

This measure requires approval by a majority of voters voting on the measure to pass.

Fiscal Impact: Proposition G would significantly increase the cost of government by approximately $9.8 million in one-time capital costs and by approximately $500,000 to $1.9 million annually. The cost of the proposed Ordinance, should it be approved by the voters, is dependent on decisions that the Mayor and Board of Supervisors make through the budget process and operational decisions made by departments, as an ordinance cannot bind future Mayors and Boards of Supervisors to provide funding for this or any other purpose.

See Endorsements for Proposition G

Pro:

Supporters argue that since the Great Highway closed, traffic injuries in Sunset neighborhoods have risen sharply - a serious and unacceptable threat to public safety. That's why Westside neighbors led a citywide volunteer effort to gather 16,000 signatures and place Proposition G on the ballot. We support great parks, but Prop G gives us both a great park AND the safe streets and neighborhoods our families deserve. They say that yes on G restores the compromise in place from 2021 to 2024: it keeps the Great Highway closed on weekends, allowing access to it as a park, but opens it to vehicle travel Monday through Friday.

A YES vote on this measure means: you support closing Sunset Dunes Park from Monday at 4:00 a.m. through Friday at 6:00 p.m to allow vehicle access.

Con:

Opponents argue that Proposition G would destroy Sunset Dunes park. In San Francisco, we don't destroy our parks; we protect them. With over 2 million visits since last year's opening, Sunset Dunes is one of San Francisco's most visited parks. They say that Proposition G asks you to spend nearly $10 million to demolish a coastal park (plus up to $1.9 million every year for added roadway maintenance), to remove all amenities, and to end the nearly 60% of visits that are on weekdays. Proposition G would require the city to remove all park features to make space for traffic. That means no more playground, skate park, or oceanview seating. It will also gut the majority of park visits as nearly 60% of visits to Sunset Dunes are on weekdays.

They argue that traffic fears have not materialized; three independent analyses confirm traffic impacts are minimal. The most impacted trips are 2-4 minutes longer during rush hour, with most trips unaffected.

A NO vote on this measure means: you want Sunset Dunes Park to remain open to pedestrians every day of the week, making no changes to current hours or use types.

Background

Sunset Dunes Park, which replaced the Great Highway between Lincoln Way and Sloat Boulevard (Upper Great Highway), is closed to private vehicles at all times. The park has been open to the public since March 14, 2025, following the passage of the voter-approved Proposition K ballot measure in November 2024. Emergency vehicles, official government vehicles, intra-park transit shuttle buses, and similar authorized vehicles are exempt from the private vehicle restriction and may continue to access the Upper Great Highway in the Park at all times.

The California Coastal Act regulates land uses along the California coast. Under the Coastal Act, changes in use of the Upper Great Highway may require a coastal development permit from the Coastal Commission. Those changes may also require approvals from other government agencies.

Proposal

The proposed measure would allow private motor vehicles to use the Upper Great Highway in Sunset Dunes Park at all times, except from Fridays at 6:00 p.m. until Mondays at 4:00 a.m. and on holidays. Emergency vehicles, official government vehicles, intra-park transit shuttle buses, and similar authorized vehicles would continue to have access to the Upper Great Highway at all times.

The City would need to obtain a coastal development permit from the Coastal Commission, and possibly approvals from other government agencies, to reopen the Upper Great Highway to private motor vehicles.

Source: Proposition G: Title and Summary

City and County of San Francisco Office of Elections

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Background

Proposal

2026 Propositions

2026 Local Ballot Measures

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