Re: [sumo-user] Mobility model used by SUMO????

[Daniel K. <d.k...@go...>]

Dear Javier,

you are living in two worlds...
VANET/V2X research uses the term "mobility model", as only the
movement of communication nodes is regarded, and most of the research
on V2X is not interested in anything more about traffic.
This of course does not count for traffic research. Here, the major
topic of interest is "traffic flow". Macroscopic models describe it
directly, and microscopic, such as used b SUMO, describe it using
single vehicles. Now, when coming to this point, ou should distinguish
between demand (possibly divided by transport mode), route choice,
lateral behaviour (lane-changing, again divided into control,
tactical, and navigational level), and longitudinal behaviour
(car-following).

So what, "adapt the mobility model" to your city? Hmph, a) generate a
proper representation of your city - may take up several month, in
dependence to the data and tools you have, as all digital road
networks lack some needed information and ou have to set up all lane
numbers, traffic lights, sensonrs etc., b) get the demand - you'll
hardly be able to do this by yourself; you should get an O/D matrix
from somewhere, perform a dynamic user assignment; all in all, this
will cost you one month if you have the data, c) optionally calibrate
the longitudinal and/or even the lateral model. d) validate the
simulation against real-world measures from inductive loops.

You know, some people just import an OpenStreetMap (dures ten minutes
if you're into SUMO), put a random demand on it (again maybe half an
hour), and then they are either happy or wonder why things do not
work.

sincerely,
Daniel








2012/6/23 Javier Eduardo Zuniga Munoz <jav...@un...>:
>
>
> Thanks for all your support..this is my question...
>
> Im doing a
> Vanet Project and im starting with SUMO; i know that we can CREATE a
> mobility model in our own using MOVE, but my teacher says that we gotta
> find the SUMO`s mobility model to "adapt it" to our city, ...and i get
> confused. Maybe he´s talking about the algorithms used by SUMO but he
> says "SUMO´s must be using a mobility model " ...please let me know if
> i`m wrong, and if i`m right give me a good reason to let him know (my
> teacher) why he`s wrong.
>
> Thanks.....
>
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