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Re: [sumo-user] routing algorithm
Yes. The turn ratios are lost on rerouting.
Note that the option for period rerouting does result in a Gawron assignment. (Gawron requires iterated simulations).

Am Di., 11. Jan. 2022 um 12:51 Uhr schrieb Mahima <mahima13@xxxxxxxxx>:
Hi Jakob,

Thanks for the reply.
So, it means if we are creating initial route file with turning ratio (20, 70, 30) using JTRrouter for a simulation and rerouting period is SET in the SUMO configuration file, the periodic rerouting will be automatically done by SUMO using the default GAWRON algorithm and not as per the turn ratios defined in the routing file.

Thanks,
Mahima





On Tue, Jan 11, 2022 at 11:49 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Hello,

jtrrouter is a tool to define initial routes from initial flows and turning rates but it is not a rerouting algorithm.

The following three concepts should be distinguished carefully:
1. defining traffic based on traffic data (this may either take the form of vehicles with fully specified routes or of trips with only origin and destination edge): https://sumo.dlr.de/docs/index.html#data_sources_for_demand_generation
2. determining vehicle routes that avoid congestion (https://sumo.dlr.de/docs/Demand/Dynamic_User_Assignment.html)
3. letting vehicles re-route during the simulation: https://sumo.dlr.de/docs/Demand/Automatic_Routing.html

jtrrouter belongs into Category 1. In contrast, Categories 2 and 3 cannot preserve turning rates so you must be careful when mixing them.

regards,
Jakob


Am Mo., 10. Jan. 2022 um 23:42 Uhr schrieb Mahima <mahima13@xxxxxxxxx>:
Hi,

I want to know which is the fastest (meaning least average mean trip time of vehicles) re-routing algorithm in the congestion scenarios. I tried running some scenarios using SUMO and found jtrrouter to be the fastest.

Please respond.

Thanks,
Mahima
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