Truck and Bus Regulation
Fleet Compliance Assistance Tool

This page last reviewed January 5, 2018

Excel compatible program is required.

Fleet Calculator (1/5/2018):  The Fleet Calculator is an Excel spreadsheet created to assist fleet owners in evaluating various compliance strategies to comply with the Truck and Bus regulation. It allows the user to input the engine model year, and emission control technology assumptions to determine what compliance options may be available to comply with the regulation for each calendar year.  Fleets can evaluate compliance strategies for meeting the compliance schedule based on engine model year or more flexible compliance strategies including the phase-in option, compliance credits, and special provisions if qualified.  Alternatively, fleets may download a copy of their fleet from the Truck Regulation Upload, Compliance and Reporting System (TRUCRS) and import the information into the compliance tool.  Provisions for heavy crane, small fleet, PM filter unavailability, limited replacement, and economic hardship are incorporated into this version.  School buses are not included in the calculator, however.  All school buses should have been equipped with a PM filter since January 1, 2014 unless approved for a PM filter extension or using the Low Use Exemption.

Truck and Bus Fleet Calculator (V2018A)  2,222 KB  
Note: Enabling of Macro in Excel is required.  How to Enable Macro

For help using the calculator, read the Compliance Calculator Guide

If you need further assistance, please email ARB's Diesel Hotline ( or call 866-6DIESEL (866-634-3735).

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