Under California's Basic Speed Law, the maximum legal speed is:
Always the posted speed limit.
California's Basic Speed Law is more nuanced than the posted limit.
Whatever speed is safe and reasonable for current conditions — never more than the posted limit.
65 mph on all freeways.
Some CA freeways post 70 mph; others lower.
Unlimited on rural interstates.
No CA roads are unlimited.
California's Basic Speed Law (CVC §22350) states that no one may drive faster than is safe for current conditions — weather, traffic, visibility — regardless of the posted limit. 55 mph in heavy fog may still be illegal even though the sign says 65. The posted limit is always the upper ceiling, never a guaranteed safe speed.
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