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Re: [sumo-user] Model 4 Stages
  • From: Michael Behrisch <oss@xxxxxxxxxxx>
  • Date: Thu, 7 Nov 2019 16:10:33 +0100
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Hi,
historically SUMO puts most emphasis on the last step which is the
routing and route assignment and subsequent optimizations to the traffic
management and treats the first three steps basically as a procedure to
generate input for the final simulation. In a sense all our demand
generating tools like activitygen or randomTrips.py do step 1 and 2
together by choosing origins and destinations for trips either based on
sociodemographic data or at random.
Concerning step 3 we usually assume the mode choice as input. This is
only different when we have (or generate) person trips as input (either
random or by some kind of origin-destination-matrix). We choose then the
mode with the least cost (usually travel time) among the modes available
to a person. This is done in the same route calculation step which
involves also the route assignment so again no clear separation of steps
here. For step 4 you might want to read the manual about the various
routers sumo provides.

Best regards,
Michael

Am 02.11.19 um 15:16 schrieb Cristian Torres 24:
> Hello
> Transport models use a classic four-stage or four-step scheme:
> 1-Generation of trips.
> 2-Travel distribution.
> 3- Modal selection
> 4-Route assignment.
> Someone knows how these 4 stages work in the Sumo tool, how it generates,
> distributes, selects a mode and assigns the route.
> 
> Thank you.
> 
> 
> 
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