Vehicle Code section 225

An “auxiliary dolly” is a vehicle, not designed for carrying persons or property on its own structure, which is so constructed and used in conjunction with a semitrailer as to support a portion of the weight of the semitrailer and any load thereon, but not permanently attached to the semitrailer, although a part of the weight of such dolly may rest on another vehicle.

Source: Section 225, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=VEH§ionNum=225.­ (updated Jan. 1, 1959; accessed Jun. 25, 2025).

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Verified:
Jun. 25, 2025

§ 225's source at ca​.gov