Software

HBEFA 5.1 was published in October 2025. Besides a comprehensive update of all emission factors and activity data, a special focus was set on cold start (HDV and BEV cold start extra emissions considered for the first time), non-exhaust pollutants (detailed emission factors by processes, subsegments, and traffic situations), non-regulated pollutants, and SCR tampering and malfunctions.

HBEFA 4.2 dates from January 2022 and is a selective update of HBEFA 4.1. Updates include new hot emissions factors for Euro VI HDV, adapted NO2/NOx ratios, additional software updates of Diesel PC, and more. For further info, see the Documentation.

HBEFA 4.1 dates from August 2019. The focus of the new features is on alternative drivetrains, besides a general update of almost all inputs.

Was released in April 2017. It is a selective update of HBEFA 3.2 containing new emission factors for NOx for diesel passenger cars only (from EURO-4 onwards). All other elements of HBEFA remain as in version 3.2.

HBEFA 3.2 dates from July 2014 and provides (apart from generic emission factors) also average emission factors for Germany, Austria, Switzerland, Sweden, Norway and France.

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With Version 3.1 (January 2010), the traffic situation definition still used today (differentiation by area type, functional road type, speed limit and level of service) was introduced. Furthermore, Sweden and Norway were made available as new countries.

Version HBEFA 2.1 was released in February 2004.

HBEFA 1.2 was developed and released in 1999.

HBEFA Version (1.1) was published in 1995. It provided data for Germany and Switzerland (and in 1998 Version "1.1A" included data for Austria as well).