Prior to emission calculation, values must be entered for the following attributes:
|
Network object |
Attribute |
Description |
|
Link type |
HBEFA_Roadtype |
Use this attribute to allocate an HBEFA road type to each Visum link type in the Link types list. |
|
Link |
Urban |
This attribute specifies whether a link is regarded as urban or rural during the calculation. Notes Your allocations should be based on the HBEFA scheme (Fundamentals: Basis for calculating warm emissions). You can set the attribute value In the Environment tab of the respective link window or in the Link list. The attribute is not directly related to the set fleet compositions Urban, Rural and Highway. |
|
Zone |
Use this attribute to specify the share of cold start separately for each zone. In the Zones list and in the HBEFA tab of the Edit zone window, you can allocate values from 0 to 1 to the attribute. Tip If the zone is a cordon zone, for example, it makes sense to allocate value 0 to the zone, because vehicles are usually warm already as they pass a cordon zone. |
|
|
Zone |
Calculate Cold Start Excess Based on Routes |
Use this attribute to specify for each zone, whether the cold start excess emission shall be calculated on the basis of routes (yes/no) or polygonally. In the Zones list, you can allocate value 0 (no) or 1 (yes) to the attribute, see calculation of the paths (Fundamentals: Basis for calculating cold start excess emissions). Alternatively, you can specify this setting in the HBEFA tab of the Edit zone window. |
