Beijing – In order to assess the emissions impact in Beijing, the GIZ Transport Demand Management Project, its partners at the Beijing Transportation Research Center (BTRC), and the Swiss INFRAS Institute developed an emission modelling database and model to quantify GHG emissions from road transport in Chinese cities – the China Handbook for Emissions Factors.

In a joint approach international and local experts adapted the European Handbook of Emission Factors for Road Transport (HBEFA) to Chinese traffic realities.

Analysing typical driving cycles in Beijing and Shenzhen and calculating the resulting emissions, using the PHEM model, the team established a first version of a detailed Chinese emission factor database. The database provides emission factors differentiated by vehicle category, road type and level of service (LOS). The four categories of traffic situations (levels of service) traditionally used in Europe were complemented by a fifth level, capturing the heavy stop-and-go situations occurring in many Chinese cities. This is not trivial, as the amount of emissions from heavy stop-and-go traffic can be up to one-third higher than those of normal stop-and-go traffic, depending on the type of road.

The detailed emission factors now serve as a basis to develop aggregated default values based on approximations of local levels of service. Aggregated values can then be used in cities, which lack the information for detailed emission calculations based on a detailed road network. GIZ and its partners are developing a set of Chinese average emission factors for small, medium, and large cities to be incorporated as default values into the CHEF-Model. Furthermore, the Chinese approach can be transferred to other cities or countries focusing on transport related emission modelling. Source: GIZ

Read more about the CHEF-Model on the GIZ China Transport Blog . Contact: daniel.bongardt@giz.de.