Demand Modelling

In the framework of SUMO, demand generation means essentially the generation of traffic participants (persons and/or different types of vehicles ) and the generation of a route for each traffic participant. It is recommended to start with demand generation only after the network has been edited. In any case it is good practice to save a scenario with the network only (without demand info).

All available vehicle types[1] can be browsed and modified under:

`scenario.demand.vtypes`

Note that each vehicle type belongs to a vehicle class, also called modes.

The different demand generation methods, as described below, will generate trips and routes, which can be browsed in

`scenario.demand.trips` and `scenario.demand.trips.routes`

The currently implemented demand generation methods are:

- Zone to zone demand flows
- Turn flows
- Virtual Population

The different demand generation methods can be used in combination: For example trips generated with method Zone to zone demand flows can be simulated together with the demand generated with the Virtual Population method.

1. Of course in a traffic scenario we have usually more than one participant of each type

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