What is the maximum weight for vehicles classified as heavy duty in smog check regulations?

The correct classification for heavy-duty vehicles in smog check regulations is based on the Gross Vehicle Weight Rating (GVWR). Heavy-duty vehicles are defined as those with a GVWR exceeding 14,000 pounds. The classification is important as it determines the specific emissions testing requirements that apply to these vehicles.

Vehicles classified as heavy-duty typically include larger trucks and buses that are utilized for commercial purposes, which can have a significant impact on air quality due to higher emissions. Understanding this classification is crucial for inspectors, as different weight categories have different regulatory implications in terms of compliance with smog check standards.

The other weight classifications listed do not apply to heavy-duty vehicles; they refer to light-duty or medium-duty vehicles, which are subject to different regulations and testing protocols.