1) marouter is capable of generating route alternatives. The option
--paths.penalty can be used to enforce creation of alternatives by
penalizing already found routes and then routing again.
2) No. Though I expect this might work. What we already did is run
instances of the mesoscopic simulation a few minutes into the future to
predict traffic states (and then roll back to an earlier state. See
https://sumo.dlr.de/wiki/Simulation/SaveAndLoad

regards,
Jakob

Am Mi., 12. Juni 2019 um 16:19 Uhr schrieb Hoffmann, Pascal <
[email protected]>:

> Dear sumo users,
>
> I’ve got a question concerning the topic of traffic assignment in sumo. I
> want to build and test an a-star routing algorithm with sumo, which is able
> to randomly assign vehicles on a set of alternative routes in case of
> congestion or any other travel time delay.
>
>    1. Therefore, I want to ask you, whether there is already any
>    multipath algorithm (...-dijkstra or a-star) for alternative routes
>    implemented in sumo? So far, I did not find anything in the mailing lists
>    and on stackoverflow.
>    2. Furthermore, I want to ask you, whether anyone already tried to use
>    the macrosimulation for a “prediction” of the traffic in a next time step?
>    My target would be to get the densities of the edges in a next time step
>    like 1 minute ahead. So that the routing algorithm could assign the
>    traffic, in case of congestion or rising travel time.
>
> Best Regards,
> Pascal Hoffmann
>
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