Billboard Lighting: Palo Alto vs Sunnyvale
How do billboard lighting rules compare between Palo Alto, CA and Sunnyvale, CA?
Palo Alto and Sunnyvale have similar restriction levels.
Palo Alto, CA
Santa Clara County
Outdoor advertising in Santa Clara County must follow Caltrans brightness rules adopted from the federal Highway Beautification Act. Digital displays cannot exceed 0.3 footcandles over ambient at the regulated measurement distance and must dim automatically at night.
View full Palo Alto rules →Sunnyvale, CA
Santa Clara County
Outdoor advertising in Santa Clara County must follow Caltrans brightness rules adopted from the federal Highway Beautification Act. Digital displays cannot exceed 0.3 footcandles over ambient at the regulated measurement distance and must dim automatically at night.
View full Sunnyvale rules →Key Facts Comparison
| Fact | Palo Alto | Sunnyvale |
|---|---|---|
| Brightness cap | 0.3 footcandles over ambient | 0.3 footcandles over ambient |
| Change interval | Minimum four seconds | Minimum four seconds |
| Required hardware | Automatic dimming photocell | Automatic dimming photocell |
| State source | Caltrans Outdoor Advertising rules | Caltrans Outdoor Advertising rules |
| Residential adjacent | Full-cutoff shielding required | Full-cutoff shielding required |
Highlighted rows indicate differences between cities.
Palo Alto FAQ
Who measures billboard brightness in a complaint?
Caltrans inspectors measure freeway-facing displays at a fixed distance from the sign face. The County's code-enforcement division responds to local light-trespass complaints from adjacent residential properties under Title C lighting standards.
Are static lighted billboards subject to the same dimming rule?
Static lighted billboards must still meet the 0.3 footcandle ambient cap and use shielded fixtures, but the four-second change-interval rule applies only to digital or animated message displays.
Sunnyvale FAQ
Who measures billboard brightness in a complaint?
Caltrans inspectors measure freeway-facing displays at a fixed distance from the sign face. The County's code-enforcement division responds to local light-trespass complaints from adjacent residential properties under Title C lighting standards.
Are static lighted billboards subject to the same dimming rule?
Static lighted billboards must still meet the 0.3 footcandle ambient cap and use shielded fixtures, but the four-second change-interval rule applies only to digital or animated message displays.
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