The population living in the planning area is broken down into so-called "behavior-homogenous" groups. The traffic behavior of the different groups should be clearly different, but within the individual groups it should be as homogenous as possible.
This documentation uses examples in which the person groups are normally broken down according to the criteria employment/education and motorization. The following table shows a division into groups with homogenous behavior and their codes (Schmiedel 1984).
|
Employees with car available |
E+c |
|
Employees without car |
E-c |
|
Not-employed with car available |
NE+c |
|
Not-employed without car |
NE-c |
|
Apprentices |
Appren |
|
Students 18 yrs and older |
Stud |
|
Pupils from secondary school |
SPup |
|
Primary school pupils |
PPup |
|
Children under six |
Child |
The demand object person group is described by the following attributes:
|
Attribute |
Description |
|
Code (Key) |
Code (any string), for example Stud |
|
Name |
Name of person group, for example students |
|
DemandModelCode |
Abbreviation of the demand model the person group belongs to (any string), e.g. DEFAULT |
When using the Standard 4-step model, generally only one single person group is required, i.e. there is a 1:1 relation between activity chain and demand stratum.
