Section 230.5.

Cal. Vehicle Code - VEH § 230.5.
in effect
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A “B-train assembly” is a rigid frame extension attached to the rear frame of a semitrailer which allows for a fifth wheel connection point for a second semitrailer.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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