Heavy-Duty Diesel Vehicles Survey

The California Air Resources Board is gathering information about heavy-duty diesel vehicles and their operations. This data will be used to better understand the age and use of diesel vehicles used in different operations such as long-haul, local delivery, and other types of operations. If you choose to fill out the survey, you will be asked for your contact information, your company information, and information about your fleet vehicles. You may keep your company information confidential by checking the box at the top of the Company Information table.

Who should complete this survey? Any person, business or corporation that owns or is leasing, for twelve months or more, any diesel powered truck, bus, pickup, or other vehicle. If you have a large number of vehicles, please contact us for assistance in entering your information.

To fill out the survey on-line: If you have not done so before, please sign in and provide your contact and company information. Please note that only one username and password will be allowed for each company.
First time users, please sign in here:

You may provide vehicle information after sign-in; or, if you like, you may provide your vehicle information or edit your vehicle information at a later date by going directly to login here:


To fill out the survey using hard copy:, please print out the On-Road Heavy-Duty Diesel Vehicle Survey, and mail it to:


Ms. Jackie Johnson
Air Resources Board/Mobile Source Control Division
1001 I Street Sacramento, CA 95812
Attn: On-Road Heavy-Duty Diesel Vehicle Survey