The results will have no meaningful ordering but sorting by distance should be trivial based on vehicle positions. You will also have to compute the correspondence to your own cell-definitions. (Though you might pre-compute the corresponding cell for each simulation edge and then retrieve the edge of each vehicle to speed this up if efficiency is a concern).
Am Do., 8. Okt. 2020 um 04:20 Uhr schrieb Hao Zhou <[email protected]>: > Thank you Jakob, I think traci.vehicle.subscribeContext() can help. > Do you know how the results will be ordered if we subscible downstream > vehicles ID within a certain distance? If they are ordered by distance to > the reference vehicle, it will definitely save us some efforts. > > To get the aggregated values in road cells, I think we can retrieve > vehicle position as well, and manually separate them into corresponding > cells to get aggregated metrics. Do you have more efficient solutions? > > Thanks, > Hao > > On October 5, 2020 at 11:21 PM, Jakob Erdmann <[email protected]> > wrote: > > Hello, > there is nothing that would give aggregated traffic data around a moving > observer. > However, you can get disaggregated data in these ways > - post-simulation output: --fcd-output with option --device.fcd.radius > (only observer should be equipped with an fcd device) > - online retrieval: traci.vehicle.subscribeContext > https://sumo.dlr.de/docs/TraCI/Interfacing_TraCI_from_Python.html#context_subscriptions > - post simulation output if only a portion of the fleet should be > observable: https://sumo.dlr.de/docs/Simulation/Bluetooth.html > > regards, > Jakob > > Am Di., 6. Okt. 2020 um 00:26 Uhr schrieb Hao Zhou <[email protected] > >: > >> Hi SUMO community, >> >> I'm interested in an efficient, real-time method to retrieve aggregated >> traffic measures around a moving observer. The fixed detectors are not very >> handy because I want to know the densities (or speed) at the upstream and >> downstream of a moving observer (car), as shown by the figure below. Those >> aggregated info are ideally meaured in road cells with lengths between >> 30m~60m. >> >> Anyone can share some neat ideas? >> >> Thank you in advance, >> >> Hao Zhou, >> Georgia Tech >> _______________________________________________ >> sumo-user mailing list >> [email protected] >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
_______________________________________________ sumo-user mailing list [email protected] To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user
