Section 21664.

Cal. Vehicle Code - VEH § 21664.
in effect
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It is unlawful for the driver of any vehicle to enter or exit any freeway which has full control of access and no crossings at grade, except upon a designated on ramp with respect to entering the freeway or a designated off ramp with respect to exiting the freeway.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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