California Smog Update

The California Air Resources Board has posted Draft Regulatory Language and the Workshop Presentation for upcoming workshops scheduled for May and June.

The proposed AB 32 Heavy-Duty Vehicle Greenhouse Gas Emission Reduction Measure is being developed to reduce greenhouse gas emissions by requiring long-haul tractors and 53-foot box-type trailers to be equipped with technologies that reduce aerodynamic drag and rolling resistance.

You can download a copy of the Draft Regulation at the following link:

To find out more information about this proposed measure, please visit