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Testing and Measuring Emissions

Dynamometer Drive Schedules

Please Note: The Code of Federal Regulations is the official source of vehicle/engine certification test procedures.

Quick Graphic Review of Driving Schedules

EPA Vehicle Chassis Dynamometer Driving Schedules (DDS) - files contain tab delimited ASCII columns

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California EPA Air Resources Board Dynamometer Driving Schedules

  • The Air Resources Board LA92 Dynamometer Driving Schedule, often called the Unified driving schedule, was developed as an emission inventory improvement tool. Compared to the FTP, the LA92 has a higher top speed, a higher average speed, less idle time, fewer stops per mile, and a higher maximum rate of acceleration.
  • The LA92Short contains the first 969 seconds of the LA92 (Unified) Dynamometer Driving Schedule.
  • For more information, leave the U.S. EPA web site and go to The California EPA Air Resources Board Exiting EPA Web site

Economic Commission for Europe Dynamometer Operating Cycles - Official guidance is found in the United Nations Economic Commission for Europe (UN/ECE) WP.29 1958 Agreement and its Addenda. Guidance is specifically found in Regulation 83 of the Regulations for the Construction of Vehicles.

Driving schedules specified in Japanese Technical Standards - Official guidance is found in the Japanese Industrial Safety and Health Association (JISHA) Technical Standards. The 11 Mode and 13 Mode driving schedules are not yet available for posting. Technical Guidances Include:

  • Rev. 11-4-28 Technical Standard for 10¥15-Mode Exhaust Emission Measurement for Gasoline-Fueled Motor Vehicles (Jisha 899, 1983)
  • Rev. 11-4-29 Technical Standard for 10-Mode and 11-Mode Exhaust Emission Measurement for Gasoline-Fueled Motor Vehicles (Jisha 899, 1983)
  • Rev. 11-4-30 Technical Standard for 13-Mode Exhaust Emission Measurement for Gasoline-Fueled Motor Vehicles (Jisha 899, 1983)
  • Rev. 11-4-31 Technical Standard for 10.15-Mode Exhaust Emission Measurement for Diesel-Powered Motor Vehicles (Jisha 899, 1983)
  • Rev. 11-4-32 Technical Standard for 10-Mode Exhaust Emission Measurement for Diesel-Powered Motor Vehicles (Jisha 899, 1983)
  • Rev. TRIAS 5-2-1990 10-Mode Fuel Economy Test Procedure for Gasoline-Fueled Motor Vehicles
  • Rev. TRIAS 5-3-1991 Technical Standard for 10.15- Fuel Economy Test Procedure for Gasoline-Fueled Motor Vehicles
  • The Japanese 10 Mode Cycle is used as a component of the total driving schedule for the 10.15 Mode Exhaust Measurement and Fuel Economy Test Procedures.
  • The Japanese 15 Mode Cycle is used as a component of the total driving schedule for the 10.15 Mode Exhaust Measurement and Fuel Economy Test Procedures.
  • The Japanese 10.15 Mode Driving Schedule for Exhaust Measurement and Fuel Economy Test Procedures are specified in Jisha Technical Standards (Jisha 899, 1983).

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Vehicle Chassis Dynamometer Shift Schedule Formatting Guidance

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For further information or assistance regarding this web page, please contact Bill Courtois, phone: (734) 214-4352 or email: courtois.william@epa.gov.

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