The Handbook of Emission Factors for Road Transport

We have decided today to move the publication of HBEFA 5.1 to October 2025.

The beta tests have been concluded by end of August. We have received very positive feedback. A few bugs have been identified that we are going to fix in the coming days.

The most important reason for postponing the publication date is that the general level of the new non-exhaust emission factors has been questioned - an issue that we want to investigate further before we publish the new version.

We are pleased to announce that we are planning to release HBEFA 5.1 in September 2025.

HBEFA 5.1 is a major update.

New features - besides a general update of all contents based on the latest measurement and statistical data - include e.g. non-exhaust emission factors differentiated by detailed vehicle types and processes, new cold start emission factors (also for HDV and BEVs), new and more detailed vehicle types (L-category, HGV size classes), Euro-7 emission factors and more.

HBEFA 5.1 will be released on a new software platform, as a Python-based client-server solution - as opposed to the Microsoft Access platform used up to Version 4.2.

License prices will be increased by 40% to compensate for inflation since 2010, when the current prices were introduced.

We are pleased to present the new HBEFA website! The old website has done its duty for almost two decades, but is now replaced due to technological developments. The new website gives us the opportunity to present information around HBEFA in a fresh look.

The order and support processes for the HBEFA application will remain largely the same for the moment as with the old website: Orders can still be placed using an order form, the INFRAS staff will process all orders and support requests personally as so far, payments are done by invoice.

The only change is that the login area, from which program and other files could be downloaded in the old website, is replaced by a Sharepoint repository. In order to access and download these files, users will receive personal access links by e-mail instead of the login data (user name/password) sent out so far.

Detailed instructions on the new order and download process can be found here.

Questions and comments regarding the new website can be addressed to INFRAS as always.