Re: [sumo-user] (no subject)

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hello,

by default all vehicles are using the route which would be the fastest in an empty network.

To distribute the traffic (without reference to measurement data) sumo supports two approaches

- perform traffic assignment (https://sumo.dlr.de/docs/Demand/Dynamic_User_Assignment.html)  - iterative or one-shot

- add randomness to the route search: https://sumo.dlr.de/docs/Simulation/Routing.html#randomimzed_travel_times

Note, that vehicles may still all use the same route after assignment if it's objectively the fastest (i.e because the roads are mostly empty).

In your case a second effect may be in play: If you load trips between taz direclty into SUMO, the arrival and depart edges will not be distributed over the TAZ. For that you need to run od2trips first.

- https://sumo.dlr.de/docs/Definition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html#traffic_assignment_zones_taz

- https://sumo.dlr.de/docs/Demand/Importing_O/D_Matrices.html

regards,

Jakob

Am Mi., 8. Dez. 2021 um 10:50 Uhr schrieb Ambreen Ilyas Athar <ambreenilyasathar@xxxxxxxxx>:

Hello to all

I have a question. hope you people will guide me.

I have a conventional grid network with 3 sources and 4 destination TAZ.  

In that network, all the vehicles traveling from one particular source TAZ (let say Taz 1) to some particular destination TAZ (let say TAZ 7), follow exactly the same edges. 

 What I want from them is to use different edges. How can I do that?

A picture of my simulation is attached in which it can be seen that the whole network is empty and vehicles are following the same set of edges.

--

Warm Regards,

Ambreen Ilyas Athar,
Assistant Professor of Computer Sc

Govt Postgraduate College for Women,

Mandian, Abbottabad

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