
CARB Regulation 2025 - Final Rule for On Road Diesel Vehicles (including Motorcoaches).
Due to conflicting data on emissions from heavy duty motor coaches developed by CARB when using different sources for a realistic statewide bus population and growth rates (or lack of growth), CARB and CBA negotiators reached a compromise agreement passed by the CARB Board on Dec. 12, 2009. The final regulation can be found on the web at:
http://www.arb.ca.gov/msprog/onrdiesel/documents/08-1211Attachment_C.pdf and is 54 pages long.
Truck & Bus Regulation Overview
http://www.arb.ca.gov/msprog/onrdiesel/onrdiesel.htm
Heavy duty engine idling emission reduction program
http://www.arb.ca.gov/msprog/truck-idling/truck-idling.htm
Diesel Emission Control Devices Searchable Database
ARB released a searchable database for verified diesel emission control systems. The database is searchable by device name (DECS name), engine family name, or a less specific search by engine model year, engine manufacturer, and displacement. The database currently includes California certified 1992 and newer on-road engines, and 1996 and newer off-road engines.
Additional model years will continue to be added. The database will be updated on a regular basis, and any corrections will be made as necessary.
The database can be accessed at the following site - http://arb.ca.gov/diesel/verdev/vdb/disclaimer.php




